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is-link">Go</button> </div> </div> </form> </div> </div> <nav class="pagination is-small is-centered breathe-horizontal" role="navigation" aria-label="pagination"> <a href="" class="pagination-previous is-invisible">Previous </a> <a href="/search/?searchtype=author&query=Ye%2C+J&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Ye%2C+J&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Ye%2C+J&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> <li> <a href="/search/?searchtype=author&query=Ye%2C+J&start=100" class="pagination-link " aria-label="Page 3" aria-current="page">3 </a> </li> </ul> </nav> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2501.09658">arXiv:2501.09658</a> <span> [<a href="https://arxiv.org/pdf/2501.09658">pdf</a>, <a href="https://arxiv.org/format/2501.09658">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> A symmetry-protected topological optical lattice clock </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Xu%2C+T">Tianrui Xu</a>, <a href="/search/quant-ph?searchtype=author&query=Chu%2C+A">Anjun Chu</a>, <a href="/search/quant-ph?searchtype=author&query=Kim%2C+K">Kyungtae Kim</a>, <a href="/search/quant-ph?searchtype=author&query=Thompson%2C+J+K">James K. Thompson</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Esslinger%2C+T">Tilman Esslinger</a>, <a href="/search/quant-ph?searchtype=author&query=Rey%2C+A+M">Ana Maria Rey</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2501.09658v1-abstract-short" style="display: inline;"> We theoretically propose a tunable implementation of symmetry-protected topological phases in a synthetic superlattice, taking advantage of the long coherence time and exquisite spectral resolutions offered by gravity-tilted optical lattice clocks. We describe a protocol similar to Rabi spectroscopy that can be used to probe the distinct topological properties of our system. We then demonstrate ho… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.09658v1-abstract-full').style.display = 'inline'; document.getElementById('2501.09658v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.09658v1-abstract-full" style="display: none;"> We theoretically propose a tunable implementation of symmetry-protected topological phases in a synthetic superlattice, taking advantage of the long coherence time and exquisite spectral resolutions offered by gravity-tilted optical lattice clocks. We describe a protocol similar to Rabi spectroscopy that can be used to probe the distinct topological properties of our system. We then demonstrate how the sensitivity of clocks and interferometers can be improved by the topological robustness to unwanted experimental imperfections. The proposed implementation opens a path to exploit the unique opportunities offered by symmetry-protected topological phases in state-of-the-art quantum sensors. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.09658v1-abstract-full').style.display = 'none'; document.getElementById('2501.09658v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages, 7 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2411.13468">arXiv:2411.13468</a> <span> [<a href="https://arxiv.org/pdf/2411.13468">pdf</a>, <a href="https://arxiv.org/format/2411.13468">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Benchmarking Quantum Convolutional Neural Networks for Classification and Data Compression Tasks </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Khoo%2C+J+Y">Jun Yong Khoo</a>, <a href="/search/quant-ph?searchtype=author&query=Gan%2C+C+K">Chee Kwan Gan</a>, <a href="/search/quant-ph?searchtype=author&query=Ding%2C+W">Wenjun Ding</a>, <a href="/search/quant-ph?searchtype=author&query=Carrazza%2C+S">Stefano Carrazza</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Kong%2C+J+F">Jian Feng Kong</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2411.13468v1-abstract-short" style="display: inline;"> Quantum Convolutional Neural Networks (QCNNs) have emerged as promising models for quantum machine learning tasks, including classification and data compression. This paper investigates the performance of QCNNs in comparison to the hardware-efficient ansatz (HEA) for classifying the phases of quantum ground states of the transverse field Ising model and the XXZ model. Various system sizes, includi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.13468v1-abstract-full').style.display = 'inline'; document.getElementById('2411.13468v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2411.13468v1-abstract-full" style="display: none;"> Quantum Convolutional Neural Networks (QCNNs) have emerged as promising models for quantum machine learning tasks, including classification and data compression. This paper investigates the performance of QCNNs in comparison to the hardware-efficient ansatz (HEA) for classifying the phases of quantum ground states of the transverse field Ising model and the XXZ model. Various system sizes, including 4, 8, and 16 qubits, through simulation were examined. Additionally, QCNN and HEA-based autoencoders were implemented to assess their capabilities in compressing quantum states. The results show that QCNN with RY gates can be trained faster due to fewer trainable parameters while matching the performance of HEAs. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.13468v1-abstract-full').style.display = 'none'; document.getElementById('2411.13468v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">3 pages, 2 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2410.01753">arXiv:2410.01753</a> <span> [<a href="https://arxiv.org/pdf/2410.01753">pdf</a>, <a href="https://arxiv.org/format/2410.01753">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41586-024-08256-5">10.1038/s41586-024-08256-5 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> $^{229}\mathrm{ThF}_4$ thin films for solid-state nuclear clocks </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Zhang%2C+C">Chuankun Zhang</a>, <a href="/search/quant-ph?searchtype=author&query=von+der+Wense%2C+L">Lars von der Wense</a>, <a href="/search/quant-ph?searchtype=author&query=Doyle%2C+J+F">Jack F. Doyle</a>, <a href="/search/quant-ph?searchtype=author&query=Higgins%2C+J+S">Jacob S. Higgins</a>, <a href="/search/quant-ph?searchtype=author&query=Ooi%2C+T">Tian Ooi</a>, <a href="/search/quant-ph?searchtype=author&query=Friebel%2C+H+U">Hans U. Friebel</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Elwell%2C+R">R. Elwell</a>, <a href="/search/quant-ph?searchtype=author&query=Terhune%2C+J+E+S">J. E. S. Terhune</a>, <a href="/search/quant-ph?searchtype=author&query=Morgan%2C+H+W+T">H. W. T. Morgan</a>, <a href="/search/quant-ph?searchtype=author&query=Alexandrova%2C+A+N">A. N. Alexandrova</a>, <a href="/search/quant-ph?searchtype=author&query=Tan%2C+H+B+T">H. B. Tran Tan</a>, <a href="/search/quant-ph?searchtype=author&query=Derevianko%2C+A">Andrei Derevianko</a>, <a href="/search/quant-ph?searchtype=author&query=Hudson%2C+E+R">Eric R. Hudson</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2410.01753v1-abstract-short" style="display: inline;"> After nearly fifty years of searching, the vacuum ultraviolet $^{229}$Th nuclear isomeric transition has recently been directly laser excited [1,2] and measured with high spectroscopic precision [3]. Nuclear clocks based on this transition are expected to be more robust [4,5] than and may outperform [6,7] current optical atomic clocks. They also promise sensitive tests for new physics beyond the s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2410.01753v1-abstract-full').style.display = 'inline'; document.getElementById('2410.01753v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2410.01753v1-abstract-full" style="display: none;"> After nearly fifty years of searching, the vacuum ultraviolet $^{229}$Th nuclear isomeric transition has recently been directly laser excited [1,2] and measured with high spectroscopic precision [3]. Nuclear clocks based on this transition are expected to be more robust [4,5] than and may outperform [6,7] current optical atomic clocks. They also promise sensitive tests for new physics beyond the standard model [5,8,9]. In light of these important advances and applications, a dramatic increase in the need for $^{229}$Th spectroscopy targets in a variety of platforms is anticipated. However, the growth and handling of high-concentration $^{229}$Th-doped crystals [5] used in previous measurements [1-3,10] are challenging due to the scarcity and radioactivity of the $^{229}$Th material. Here, we demonstrate a potentially scalable solution to these problems by demonstrating laser excitation of the nuclear transition in $^{229}$ThF$_4$ thin films grown with a physical vapor deposition process, consuming only micrograms of $^{229}$Th material. The $^{229}$ThF$_4$ thin films are intrinsically compatible with photonics platforms and nanofabrication tools for integration with laser sources and detectors, paving the way for an integrated and field-deployable solid-state nuclear clock with radioactivity up to three orders of magnitude smaller than typical \thor-doped crystals [1-3,10]. The high nuclear emitter density in $^{229}$ThF$_4$ also potentially enables quantum optics studies in a new regime. Finally, we describe the operation and present the estimation of the performance of a nuclear clock based on a defect-free ThF$_4$ crystal. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2410.01753v1-abstract-full').style.display = 'none'; document.getElementById('2410.01753v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 October, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature 636, 603-608 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2408.07032">arXiv:2408.07032</a> <span> [<a href="https://arxiv.org/pdf/2408.07032">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Cryptography and Security">cs.CR</span> </div> </div> <p class="title is-5 mathjax"> QIris: Quantum Implementation of Rainbow Table Attacks </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Quan%2C+L+J">Lee Jun Quan</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+T+J">Tan Jia Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Ling%2C+G+G">Goh Geok Ling</a>, <a href="/search/quant-ph?searchtype=author&query=Balachandran%2C+V">Vivek Balachandran</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2408.07032v1-abstract-short" style="display: inline;"> This paper explores the use of Grover's Algorithm in the classical rainbow table, uncovering the potential of integrating quantum computing techniques with conventional cryptographic methods to develop a Quantum Rainbow Table Proof-of-Concept. This leverages on Quantum concepts and algorithms which includes the principle of qubit superposition, entanglement and teleportation, coupled with Grover's… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.07032v1-abstract-full').style.display = 'inline'; document.getElementById('2408.07032v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2408.07032v1-abstract-full" style="display: none;"> This paper explores the use of Grover's Algorithm in the classical rainbow table, uncovering the potential of integrating quantum computing techniques with conventional cryptographic methods to develop a Quantum Rainbow Table Proof-of-Concept. This leverages on Quantum concepts and algorithms which includes the principle of qubit superposition, entanglement and teleportation, coupled with Grover's Algorithm to enable a more efficient search through the rainbow table. The paper also details on the hardware constraints and the work around to produce better results in the implementation stages. Through this work we develop a working prototype of quantum rainbow table and demonstrate how quantum computing could significantly improve the speed of cyber tools such as password crackers and thus impact the cyber security landscape. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.07032v1-abstract-full').style.display = 'none'; document.getElementById('2408.07032v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2408.03815">arXiv:2408.03815</a> <span> [<a href="https://arxiv.org/pdf/2408.03815">pdf</a>, <a href="https://arxiv.org/format/2408.03815">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Dissipation Driven Coherent Dynamics Observed in Bose-Einstein Condensates </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Tian%2C+Y">Ye Tian</a>, <a href="/search/quant-ph?searchtype=author&query=Zhao%2C+Y">Yajuan Zhao</a>, <a href="/search/quant-ph?searchtype=author&query=Wu%2C+Y">Yue Wu</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jilai Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Mei%2C+S">Shuyao Mei</a>, <a href="/search/quant-ph?searchtype=author&query=Chi%2C+Z">Zhihao Chi</a>, <a href="/search/quant-ph?searchtype=author&query=Tian%2C+T">Tian Tian</a>, <a href="/search/quant-ph?searchtype=author&query=Wang%2C+C">Ce Wang</a>, <a href="/search/quant-ph?searchtype=author&query=Shi%2C+Z">Zhe-Yu Shi</a>, <a href="/search/quant-ph?searchtype=author&query=Chen%2C+Y">Yu Chen</a>, <a href="/search/quant-ph?searchtype=author&query=Hu%2C+J">Jiazhong Hu</a>, <a href="/search/quant-ph?searchtype=author&query=Zhai%2C+H">Hui Zhai</a>, <a href="/search/quant-ph?searchtype=author&query=Chen%2C+W">Wenlan Chen</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2408.03815v1-abstract-short" style="display: inline;"> We report the first experimental observation of dissipation-driven coherent quantum many-body oscillation, and this oscillation is manifested as the coherent exchange of atoms between the thermal and the condensate components in a three-dimensional partially condensed Bose gas. Firstly, we observe that the dissipation leads to two different atom loss rates between the thermal and the condensate co… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.03815v1-abstract-full').style.display = 'inline'; document.getElementById('2408.03815v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2408.03815v1-abstract-full" style="display: none;"> We report the first experimental observation of dissipation-driven coherent quantum many-body oscillation, and this oscillation is manifested as the coherent exchange of atoms between the thermal and the condensate components in a three-dimensional partially condensed Bose gas. Firstly, we observe that the dissipation leads to two different atom loss rates between the thermal and the condensate components, such that the thermal fraction increases as dissipation time increases. Therefore, this dissipation process serves as a tool to uniformly ramp up the system's temperature without introducing extra density excitation. Subsequently, a coherent pair exchange of atoms between the thermal and the condensate components occurs, resulting in coherent oscillation of atom numbers in both components. This oscillation, permanently embedded in the atom loss process, is revealed clearly when we inset a duration of dissipation-free evolution into the entire dynamics, manifested as an oscillation of total atom number at the end. Finally, we also present a theoretical calculation to support this physical mechanism, which simultaneously includes dissipation, interaction, finite temperature, and harmonic trap effects. Our work introduces a highly controllable dissipation as a new tool to control quantum many-body dynamics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.03815v1-abstract-full').style.display = 'none'; document.getElementById('2408.03815v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">11 pages, 5 figures, 1 table</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2408.03801">arXiv:2408.03801</a> <span> [<a href="https://arxiv.org/pdf/2408.03801">pdf</a>, <a href="https://arxiv.org/format/2408.03801">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Hamiltonian learning for 300 trapped ion qubits with long-range couplings </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Guo%2C+S+-">S. -A. Guo</a>, <a href="/search/quant-ph?searchtype=author&query=Wu%2C+Y+-">Y. -K. Wu</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">J. Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Zhang%2C+L">L. Zhang</a>, <a href="/search/quant-ph?searchtype=author&query=Wang%2C+Y">Y. Wang</a>, <a href="/search/quant-ph?searchtype=author&query=Lian%2C+W+-">W. -Q. Lian</a>, <a href="/search/quant-ph?searchtype=author&query=Yao%2C+R">R. Yao</a>, <a href="/search/quant-ph?searchtype=author&query=Xu%2C+Y+-">Y. -L. Xu</a>, <a href="/search/quant-ph?searchtype=author&query=Zhang%2C+C">C. Zhang</a>, <a href="/search/quant-ph?searchtype=author&query=Xu%2C+Y+-">Y. -Z. Xu</a>, <a href="/search/quant-ph?searchtype=author&query=Qi%2C+B+-">B. -X. Qi</a>, <a href="/search/quant-ph?searchtype=author&query=Hou%2C+P+-">P. -Y. Hou</a>, <a href="/search/quant-ph?searchtype=author&query=He%2C+L">L. He</a>, <a href="/search/quant-ph?searchtype=author&query=Zhou%2C+Z+-">Z. -C. Zhou</a>, <a href="/search/quant-ph?searchtype=author&query=Duan%2C+L+-">L. -M. Duan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2408.03801v1-abstract-short" style="display: inline;"> Quantum simulators with hundreds of qubits and engineerable Hamiltonians have the potential to explore quantum many-body models that are intractable for classical computers. However, learning the simulated Hamiltonian, a prerequisite for any applications of a quantum simulator, remains an outstanding challenge due to the fast increasing time cost with the qubit number and the lack of high-fidelity… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.03801v1-abstract-full').style.display = 'inline'; document.getElementById('2408.03801v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2408.03801v1-abstract-full" style="display: none;"> Quantum simulators with hundreds of qubits and engineerable Hamiltonians have the potential to explore quantum many-body models that are intractable for classical computers. However, learning the simulated Hamiltonian, a prerequisite for any applications of a quantum simulator, remains an outstanding challenge due to the fast increasing time cost with the qubit number and the lack of high-fidelity universal gate operations in the noisy intermediate-scale quantum era. Here we demonstrate the Hamiltonian learning of a two-dimensional ion trap quantum simulator with 300 qubits. We employ global manipulations and single-qubit-resolved state detection to efficiently learn the all-to-all-coupled Ising model Hamiltonian, with the required quantum resources scaling at most linearly with the qubit number. Our work paves the way for wide applications of large-scale ion trap quantum simulators. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.03801v1-abstract-full').style.display = 'none'; document.getElementById('2408.03801v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.18719">arXiv:2406.18719</a> <span> [<a href="https://arxiv.org/pdf/2406.18719">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41586-024-07839-6">10.1038/s41586-024-07839-6 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Frequency ratio of the $^{229\mathrm{m}}$Th nuclear isomeric transition and the $^{87}$Sr atomic clock </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Zhang%2C+C">Chuankun Zhang</a>, <a href="/search/quant-ph?searchtype=author&query=Ooi%2C+T">Tian Ooi</a>, <a href="/search/quant-ph?searchtype=author&query=Higgins%2C+J+S">Jacob S. Higgins</a>, <a href="/search/quant-ph?searchtype=author&query=Doyle%2C+J+F">Jack F. Doyle</a>, <a href="/search/quant-ph?searchtype=author&query=von+der+Wense%2C+L">Lars von der Wense</a>, <a href="/search/quant-ph?searchtype=author&query=Beeks%2C+K">Kjeld Beeks</a>, <a href="/search/quant-ph?searchtype=author&query=Leitner%2C+A">Adrian Leitner</a>, <a href="/search/quant-ph?searchtype=author&query=Kazakov%2C+G">Georgy Kazakov</a>, <a href="/search/quant-ph?searchtype=author&query=Li%2C+P">Peng Li</a>, <a href="/search/quant-ph?searchtype=author&query=Thirolf%2C+P+G">Peter G. Thirolf</a>, <a href="/search/quant-ph?searchtype=author&query=Schumm%2C+T">Thorsten Schumm</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2406.18719v2-abstract-short" style="display: inline;"> Optical atomic clocks$^{1,2}$ use electronic energy levels to precisely keep track of time. A clock based on nuclear energy levels promises a next-generation platform for precision metrology and fundamental physics studies. Thorium-229 nuclei exhibit a uniquely low energy nuclear transition within reach of state-of-the-art vacuum ultraviolet (VUV) laser light sources and have therefore been propos… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.18719v2-abstract-full').style.display = 'inline'; document.getElementById('2406.18719v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.18719v2-abstract-full" style="display: none;"> Optical atomic clocks$^{1,2}$ use electronic energy levels to precisely keep track of time. A clock based on nuclear energy levels promises a next-generation platform for precision metrology and fundamental physics studies. Thorium-229 nuclei exhibit a uniquely low energy nuclear transition within reach of state-of-the-art vacuum ultraviolet (VUV) laser light sources and have therefore been proposed for construction of the first nuclear clock$^{3,4}$. However, quantum state-resolved spectroscopy of the $^{229m}$Th isomer to determine the underlying nuclear structure and establish a direct frequency connection with existing atomic clocks has yet to be performed. Here, we use a VUV frequency comb to directly excite the narrow $^{229}$Th nuclear clock transition in a solid-state CaF$_2$ host material and determine the absolute transition frequency. We stabilize the fundamental frequency comb to the JILA $^{87}$Sr clock$^2$ and coherently upconvert the fundamental to its 7th harmonic in the VUV range using a femtosecond enhancement cavity. This VUV comb establishes a frequency link between nuclear and electronic energy levels and allows us to directly measure the frequency ratio of the $^{229}$Th nuclear clock transition and the $^{87}$Sr atomic clock. We also precisely measure the nuclear quadrupole splittings and extract intrinsic properties of the isomer. These results mark the start of nuclear-based solid-state optical clock and demonstrate the first comparison of nuclear and atomic clocks for fundamental physics studies. This work represents a confluence of precision metrology, ultrafast strong field physics, nuclear physics, and fundamental physics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.18719v2-abstract-full').style.display = 'none'; document.getElementById('2406.18719v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">22 pages, 5 figures, 1 extended data figure</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature 633, 63-70 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.13999">arXiv:2406.13999</a> <span> [<a href="https://arxiv.org/pdf/2406.13999">pdf</a>, <a href="https://arxiv.org/format/2406.13999">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Individually Addressed Entangling Gates in a Two-Dimensional Ion Crystal </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Hou%2C+Y+-">Y. -H. Hou</a>, <a href="/search/quant-ph?searchtype=author&query=Yi%2C+Y+-">Y. -J. Yi</a>, <a href="/search/quant-ph?searchtype=author&query=Wu%2C+Y+-">Y. -K. Wu</a>, <a href="/search/quant-ph?searchtype=author&query=Chen%2C+Y+-">Y. -Y. Chen</a>, <a href="/search/quant-ph?searchtype=author&query=Zhang%2C+L">L. Zhang</a>, <a href="/search/quant-ph?searchtype=author&query=Wang%2C+Y">Y. Wang</a>, <a href="/search/quant-ph?searchtype=author&query=Xu%2C+Y+-">Y. -L. Xu</a>, <a href="/search/quant-ph?searchtype=author&query=Zhang%2C+C">C. Zhang</a>, <a href="/search/quant-ph?searchtype=author&query=Mei%2C+Q+-">Q. -X. Mei</a>, <a href="/search/quant-ph?searchtype=author&query=Yang%2C+H+-">H. -X. Yang</a>, <a href="/search/quant-ph?searchtype=author&query=Ma%2C+J+-">J. -Y. Ma</a>, <a href="/search/quant-ph?searchtype=author&query=Guo%2C+S+-">S. -A. Guo</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">J. Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Qi%2C+B+-">B. -X. Qi</a>, <a href="/search/quant-ph?searchtype=author&query=Zhou%2C+Z+-">Z. -C. Zhou</a>, <a href="/search/quant-ph?searchtype=author&query=Hou%2C+P+-">P. -Y. Hou</a>, <a href="/search/quant-ph?searchtype=author&query=Duan%2C+L+-">L. -M. Duan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2406.13999v1-abstract-short" style="display: inline;"> Two-dimensional (2D) ion crystals have become a promising way to scale up qubit numbers for ion trap quantum information processing. However, to realize universal quantum computing in this system, individually addressed high-fidelity two-qubit entangling gates still remain challenging due to the inevitable micromotion of ions in a 2D crystal as well as the technical difficulty in 2D addressing. He… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.13999v1-abstract-full').style.display = 'inline'; document.getElementById('2406.13999v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.13999v1-abstract-full" style="display: none;"> Two-dimensional (2D) ion crystals have become a promising way to scale up qubit numbers for ion trap quantum information processing. However, to realize universal quantum computing in this system, individually addressed high-fidelity two-qubit entangling gates still remain challenging due to the inevitable micromotion of ions in a 2D crystal as well as the technical difficulty in 2D addressing. Here we demonstrate two-qubit entangling gates between any ion pairs in a 2D crystal of four ions. We use symmetrically placed crossed acousto-optic deflectors (AODs) to drive Raman transitions and achieve an addressing crosstalk error below 0.1%. We design and demonstrate a gate sequence by alternatingly addressing two target ions, making it compatible with any single-ion addressing techniques without crosstalk from multiple addressing beams. We further examine the gate performance versus the micromotion amplitude of the ions and show that its effect can be compensated by a recalibration of the laser intensity without degrading the gate fidelity. Our work paves the way for ion trap quantum computing with hundreds to thousands of qubits on a 2D ion crystal. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.13999v1-abstract-full').style.display = 'none'; document.getElementById('2406.13999v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.13907">arXiv:2406.13907</a> <span> [<a href="https://arxiv.org/pdf/2406.13907">pdf</a>, <a href="https://arxiv.org/format/2406.13907">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Observation of full contrast icosahedral Bose-Einstein statistics in laser desorbed, buffer gas cooled C$_{60}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Chan%2C+Y">Ya-Chu Chan</a>, <a href="/search/quant-ph?searchtype=author&query=Liu%2C+L+R">Lee R. Liu</a>, <a href="/search/quant-ph?searchtype=author&query=Scheck%2C+A">Andrew Scheck</a>, <a href="/search/quant-ph?searchtype=author&query=Nesbitt%2C+D+J">David J. Nesbitt</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Rosenberg%2C+D">Dina Rosenberg</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2406.13907v2-abstract-short" style="display: inline;"> The quantum mechanical nature of spherical top molecules is particularly evident at low angular momentum quantum number J. Using infrared spectroscopy on the 8.4$渭$m rovibrational band of buffer gas cooled $^{12}$C$_{60}$, we observe the hitherto unseen R(J = 0 - 29) rotational progression, including the complete disappearance of certain transitions due to the molecule's perfect icosahedral symmet… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.13907v2-abstract-full').style.display = 'inline'; document.getElementById('2406.13907v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.13907v2-abstract-full" style="display: none;"> The quantum mechanical nature of spherical top molecules is particularly evident at low angular momentum quantum number J. Using infrared spectroscopy on the 8.4$渭$m rovibrational band of buffer gas cooled $^{12}$C$_{60}$, we observe the hitherto unseen R(J = 0 - 29) rotational progression, including the complete disappearance of certain transitions due to the molecule's perfect icosahedral symmetry and identical bosonic nuclei. The observation of extremely weak C$_{60}$ absorption is facilitated by a laser desorption C$_{60}$ vapor source, which transfers 1000-fold less heat to the cryogenic buffer gas cell than a traditional oven source. This technique paves the way to cooling C$_{60}$ and other large gas phase molecules to much lower temperatures, providing continued advances for spectral resolution and sensitivity. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.13907v2-abstract-full').style.display = 'none'; document.getElementById('2406.13907v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.03804">arXiv:2406.03804</a> <span> [<a href="https://arxiv.org/pdf/2406.03804">pdf</a>, <a href="https://arxiv.org/format/2406.03804">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="General Relativity and Quantum Cosmology">gr-qc</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> </div> <p class="title is-5 mathjax"> Exploring the interplay between mass-energy equivalence, interactions and entanglement in an optical lattice clock </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Chu%2C+A">Anjun Chu</a>, <a href="/search/quant-ph?searchtype=author&query=Mart%C3%ADnez-Lahuerta%2C+V+J">Victor J. Mart铆nez-Lahuerta</a>, <a href="/search/quant-ph?searchtype=author&query=Miklos%2C+M">Maya Miklos</a>, <a href="/search/quant-ph?searchtype=author&query=Kim%2C+K">Kyungtae Kim</a>, <a href="/search/quant-ph?searchtype=author&query=Zoller%2C+P">Peter Zoller</a>, <a href="/search/quant-ph?searchtype=author&query=Hammerer%2C+K">Klemens Hammerer</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Rey%2C+A+M">Ana Maria Rey</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2406.03804v1-abstract-short" style="display: inline;"> We propose protocols that probe manifestations of the mass-energy equivalence in an optical lattice clock (OLC) interrogated with spin coherent and entangled quantum states. To tune and uniquely distinguish the mass-energy equivalence effects (gravitational redshift and second order Doppler shift) in such setting, we devise a dressing protocol using an additional nuclear spin state. We then analyz… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.03804v1-abstract-full').style.display = 'inline'; document.getElementById('2406.03804v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.03804v1-abstract-full" style="display: none;"> We propose protocols that probe manifestations of the mass-energy equivalence in an optical lattice clock (OLC) interrogated with spin coherent and entangled quantum states. To tune and uniquely distinguish the mass-energy equivalence effects (gravitational redshift and second order Doppler shift) in such setting, we devise a dressing protocol using an additional nuclear spin state. We then analyze the interplay between photon-mediated interactions and gravitational redshift and show that such interplay can lead to entanglement generation and frequency synchronization. In the regime where all atomic spins synchronize, we show the synchronization time depends on the initial entanglement of the state and can be used as a proxy of its metrological gain compared to a classical state. Our work opens new possibilities for exploring the effects of general relativity on quantum coherence and entanglement in OLC experiments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.03804v1-abstract-full').style.display = 'none'; document.getElementById('2406.03804v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7+17 pages, 4+6 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.03609">arXiv:2406.03609</a> <span> [<a href="https://arxiv.org/pdf/2406.03609">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Modulated Ringdown Comb Interferometry for next-generation high complexity trace gas sensing </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Liang%2C+Q">Qizhong Liang</a>, <a href="/search/quant-ph?searchtype=author&query=Bisht%2C+A">Apoorva Bisht</a>, <a href="/search/quant-ph?searchtype=author&query=Scheck%2C+A">Andrew Scheck</a>, <a href="/search/quant-ph?searchtype=author&query=Schunemann%2C+P+G">Peter G. Schunemann</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2406.03609v1-abstract-short" style="display: inline;"> Gas samples relevant to health and environment typically contain a plethora of molecular species that span a huge concentration dynamic range. High-concentration molecules impose a strong absorption background that hinders robust identification of low-concentration species. While mid-infrared frequency comb spectroscopy with high-finesse cavity enhancement has realized many of the most sensitive m… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.03609v1-abstract-full').style.display = 'inline'; document.getElementById('2406.03609v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.03609v1-abstract-full" style="display: none;"> Gas samples relevant to health and environment typically contain a plethora of molecular species that span a huge concentration dynamic range. High-concentration molecules impose a strong absorption background that hinders robust identification of low-concentration species. While mid-infrared frequency comb spectroscopy with high-finesse cavity enhancement has realized many of the most sensitive multi-species trace gas detection to date, its robust performance requires gas samples to contain only weak absorption features to avoid dispersing cavity resonances from the comb line frequencies. Here we introduce a new technique that is free from this restriction, thus enabling the development of next-generation multi-species trace gas sensing with broad applicability to complex and dynamic molecular compositions. The principle of Modulated Ringdown Comb Interferometry is to resolve ringdown dynamics carried by massively parallel comb lines transmitted through a length-modulated cavity. This method leverages both periodicity of the field dynamics and Doppler frequency shifts introduced from a Michelson interferometer. Scalable enhancement of both spectral coverage and cavity finesse is enabled with dispersion immune and high-efficiency data collection. Built upon this platform, we realize in the mid-infrared a product of finesse and spectral coverage that is orders of magnitude better than all prior experiments. We demonstrate the power of this technique by measuring highly dispersive exhaled human breath samples over a vastly expanded spectral coverage of 1,010 cm-1 and with cavity finesse of 23,000. This allows for the first time simultaneous quantification of 20 distinct molecular species at > 1 part-per-trillion sensitivity with their concentrations varying by 7 orders of magnitude. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.03609v1-abstract-full').style.display = 'none'; document.getElementById('2406.03609v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.04665">arXiv:2405.04665</a> <span> [<a href="https://arxiv.org/pdf/2405.04665">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.132.190001">10.1103/PhysRevLett.132.190001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Quantum sensing with atomic, molecular, and optical platforms for fundamental physics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Zoller%2C+P">Peter Zoller</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2405.04665v1-abstract-short" style="display: inline;"> Atomic, molecular, and optical (AMO) physics has been at the forefront of the development of quantum science while laying the foundation for modern technology. With the growing capabilities of quantum control of many atoms for engineered many-body states and quantum entanglement, a key question emerges: what critical impact will the second quantum revolution with ubiquitous applications of entangl… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.04665v1-abstract-full').style.display = 'inline'; document.getElementById('2405.04665v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.04665v1-abstract-full" style="display: none;"> Atomic, molecular, and optical (AMO) physics has been at the forefront of the development of quantum science while laying the foundation for modern technology. With the growing capabilities of quantum control of many atoms for engineered many-body states and quantum entanglement, a key question emerges: what critical impact will the second quantum revolution with ubiquitous applications of entanglement bring to bear on fundamental physics? In this Essay, we argue that a compelling long-term vision for fundamental physics and novel applications is to harness the rapid development of quantum information science to define and advance the frontiers of measurement physics, with strong potential for fundamental discoveries. As quantum technologies, such as fault-tolerant quantum computing and entangled quantum sensor networks, become much more advanced than today's realization, we wonder what doors of basic science can these tools unlock? We anticipate that some of the most intriguing and challenging problems, such as quantum aspects of gravity, fundamental symmetries, or new physics beyond the minimal standard model, will be tackled at the emerging quantum measurement frontier. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.04665v1-abstract-full').style.display = 'none'; document.getElementById('2405.04665v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">17 pages, 1 figure, Part of a series of Phys. Rev. Lett. Essays which concisely present author visions for the future of their field</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 132, 190001 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2403.00264">arXiv:2403.00264</a> <span> [<a href="https://arxiv.org/pdf/2403.00264">pdf</a>, <a href="https://arxiv.org/format/2403.00264">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> </div> <p class="title is-5 mathjax"> Generation and optimization of entanglement between atoms chirally coupled to spin cavities </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=You%2C+J">Jia-Bin You</a>, <a href="/search/quant-ph?searchtype=author&query=Kong%2C+J+F">Jian Feng Kong</a>, <a href="/search/quant-ph?searchtype=author&query=Aghamalyan%2C+D">Davit Aghamalyan</a>, <a href="/search/quant-ph?searchtype=author&query=Mok%2C+W">Wai-Keong Mok</a>, <a href="/search/quant-ph?searchtype=author&query=Lim%2C+K+H">Kian Hwee Lim</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Png%2C+C+E">Ching Eng Png</a>, <a href="/search/quant-ph?searchtype=author&query=Garc%C3%ADa-Vidal%2C+F+J">Francisco J. Garc铆a-Vidal</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2403.00264v2-abstract-short" style="display: inline;"> We explore the generation and optimization of entanglement between atoms chirally coupled to finite 1D spin chains, functioning as {\it spin cavities}. By diagonalizing the spin cavity Hamiltonian, we identify a parity effect that influences entanglement, with small even-sized cavities chirally coupled to atoms expediting entanglement generation by approximately $50\%$ faster than non-chiral coupl… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.00264v2-abstract-full').style.display = 'inline'; document.getElementById('2403.00264v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2403.00264v2-abstract-full" style="display: none;"> We explore the generation and optimization of entanglement between atoms chirally coupled to finite 1D spin chains, functioning as {\it spin cavities}. By diagonalizing the spin cavity Hamiltonian, we identify a parity effect that influences entanglement, with small even-sized cavities chirally coupled to atoms expediting entanglement generation by approximately $50\%$ faster than non-chiral coupling. Applying a classical driving field to the atoms reveals oscillations in concurrence, with resonant dips at specific driving strengths due to the resonances between the driven atom and the spin cavity. Extending our study to systems with energetic disorder, we find that high concurrence can be achieved regardless of disorder strength when the inverse participation ratio of the resulting eigenstates is favorable. Finally, we demonstrate that controlled disorder within the cavity significantly enhances and expedites entanglement generation, achieving higher concurrences up to four times faster than those attained in ordered systems. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.00264v2-abstract-full').style.display = 'none'; document.getElementById('2403.00264v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 February, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2402.16289">arXiv:2402.16289</a> <span> [<a href="https://arxiv.org/pdf/2402.16289">pdf</a>, <a href="https://arxiv.org/format/2402.16289">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41586-024-07913-z">10.1038/s41586-024-07913-z <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Multi-qubit gates and Schr枚dinger cat states in an optical clock </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Cao%2C+A">Alec Cao</a>, <a href="/search/quant-ph?searchtype=author&query=Eckner%2C+W+J">William J. Eckner</a>, <a href="/search/quant-ph?searchtype=author&query=Yelin%2C+T+L">Theodor Lukin Yelin</a>, <a href="/search/quant-ph?searchtype=author&query=Young%2C+A+W">Aaron W. Young</a>, <a href="/search/quant-ph?searchtype=author&query=Jandura%2C+S">Sven Jandura</a>, <a href="/search/quant-ph?searchtype=author&query=Yan%2C+L">Lingfeng Yan</a>, <a href="/search/quant-ph?searchtype=author&query=Kim%2C+K">Kyungtae Kim</a>, <a href="/search/quant-ph?searchtype=author&query=Pupillo%2C+G">Guido Pupillo</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Oppong%2C+N+D">Nelson Darkwah Oppong</a>, <a href="/search/quant-ph?searchtype=author&query=Kaufman%2C+A+M">Adam M. Kaufman</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2402.16289v3-abstract-short" style="display: inline;"> Many-particle entanglement is a key resource for achieving the fundamental precision limits of a quantum sensor. Optical atomic clocks, the current state-of-the-art in frequency precision, are a rapidly emerging area of focus for entanglement-enhanced metrology. Augmenting tweezer-based clocks featuring microscopic control and detection with the high-fidelity entangling gates developed for atom-ar… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.16289v3-abstract-full').style.display = 'inline'; document.getElementById('2402.16289v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2402.16289v3-abstract-full" style="display: none;"> Many-particle entanglement is a key resource for achieving the fundamental precision limits of a quantum sensor. Optical atomic clocks, the current state-of-the-art in frequency precision, are a rapidly emerging area of focus for entanglement-enhanced metrology. Augmenting tweezer-based clocks featuring microscopic control and detection with the high-fidelity entangling gates developed for atom-array information processing offers a promising route towards leveraging highly entangled quantum states for improved optical clocks. Here we develop and employ a family of multi-qubit Rydberg gates to generate Schr枚dinger cat states of the Greenberger-Horne-Zeilinger (GHZ) type with up to 9 optical clock qubits in a programmable atom array. In an atom-laser comparison at sufficiently short dark times, we demonstrate a fractional frequency instability below the standard quantum limit using GHZ states of up to 4 qubits. However, due to their reduced dynamic range, GHZ states of a single size fail to improve the achievable clock precision at the optimal dark time compared to unentangled atoms. Towards overcoming this hurdle, we simultaneously prepare a cascade of varying-size GHZ states to perform unambiguous phase estimation over an extended interval. These results demonstrate key building blocks for approaching Heisenberg-limited scaling of optical atomic clock precision. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.16289v3-abstract-full').style.display = 'none'; document.getElementById('2402.16289v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 October, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 25 February, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">22 pages, 7 figures, 2 tables, corrected typo in Eq. (13) and added journal reference</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature 634, 315-320 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.17163">arXiv:2311.17163</a> <span> [<a href="https://arxiv.org/pdf/2311.17163">pdf</a>, <a href="https://arxiv.org/format/2311.17163">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> A Site-Resolved 2D Quantum Simulator with Hundreds of Trapped Ions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Guo%2C+S+-">S. -A. Guo</a>, <a href="/search/quant-ph?searchtype=author&query=Wu%2C+Y+-">Y. -K. Wu</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">J. Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Zhang%2C+L">L. Zhang</a>, <a href="/search/quant-ph?searchtype=author&query=Lian%2C+W+-">W. -Q. Lian</a>, <a href="/search/quant-ph?searchtype=author&query=Yao%2C+R">R. Yao</a>, <a href="/search/quant-ph?searchtype=author&query=Wang%2C+Y">Y. Wang</a>, <a href="/search/quant-ph?searchtype=author&query=Yan%2C+R+-">R. -Y. Yan</a>, <a href="/search/quant-ph?searchtype=author&query=Yi%2C+Y+-">Y. -J. Yi</a>, <a href="/search/quant-ph?searchtype=author&query=Xu%2C+Y+-">Y. -L. Xu</a>, <a href="/search/quant-ph?searchtype=author&query=Li%2C+B+-">B. -W. Li</a>, <a href="/search/quant-ph?searchtype=author&query=Hou%2C+Y+-">Y. -H. Hou</a>, <a href="/search/quant-ph?searchtype=author&query=Xu%2C+Y+-">Y. -Z. Xu</a>, <a href="/search/quant-ph?searchtype=author&query=Guo%2C+W+-">W. -X. Guo</a>, <a href="/search/quant-ph?searchtype=author&query=Zhang%2C+C">C. Zhang</a>, <a href="/search/quant-ph?searchtype=author&query=Qi%2C+B+-">B. -X. Qi</a>, <a href="/search/quant-ph?searchtype=author&query=Zhou%2C+Z+-">Z. -C. Zhou</a>, <a href="/search/quant-ph?searchtype=author&query=He%2C+L">L. He</a>, <a href="/search/quant-ph?searchtype=author&query=Duan%2C+L+-">L. -M. Duan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2311.17163v2-abstract-short" style="display: inline;"> A large qubit capacity and an individual readout capability are two crucial requirements for large-scale quantum computing and simulation. As one of the leading physical platforms for quantum information processing, the ion trap has achieved quantum simulation of tens of ions with site-resolved readout in 1D Paul trap, and that of hundreds of ions with global observables in 2D Penning trap. Howeve… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.17163v2-abstract-full').style.display = 'inline'; document.getElementById('2311.17163v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.17163v2-abstract-full" style="display: none;"> A large qubit capacity and an individual readout capability are two crucial requirements for large-scale quantum computing and simulation. As one of the leading physical platforms for quantum information processing, the ion trap has achieved quantum simulation of tens of ions with site-resolved readout in 1D Paul trap, and that of hundreds of ions with global observables in 2D Penning trap. However, integrating these two features into a single system is still very challenging. Here we report the stable trapping of 512 ions in a 2D Wigner crystal and the sideband cooling of their transverse motion. We demonstrate the quantum simulation of long-range quantum Ising models with tunable coupling strengths and patterns, with or without frustration, using 300 ions. Enabled by the site resolution in the single-shot measurement, we observe rich spatial correlation patterns in the quasi-adiabatically prepared ground states, which allows us to verify quantum simulation results by comparing with the calculated collective phonon modes and with classical simulated annealing. We further probe the quench dynamics of the Ising model in a transverse field to demonstrate quantum sampling tasks. Our work paves the way for simulating classically intractable quantum dynamics and for running NISQ algorithms using 2D ion trap quantum simulators. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.17163v2-abstract-full').style.display = 'none'; document.getElementById('2311.17163v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2309.10257">arXiv:2309.10257</a> <span> [<a href="https://arxiv.org/pdf/2309.10257">pdf</a>, <a href="https://arxiv.org/format/2309.10257">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Statistical Mechanics">cond-mat.stat-mech</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41567-025-02800-4">10.1038/s41567-025-02800-4 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Observation of universal dissipative dynamics in strongly correlated quantum gas </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Zhao%2C+Y">Yajuan Zhao</a>, <a href="/search/quant-ph?searchtype=author&query=Tian%2C+Y">Ye Tian</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jilai Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Wu%2C+Y">Yue Wu</a>, <a href="/search/quant-ph?searchtype=author&query=Zhao%2C+Z">Zihan Zhao</a>, <a href="/search/quant-ph?searchtype=author&query=Chi%2C+Z">Zhihao Chi</a>, <a href="/search/quant-ph?searchtype=author&query=Tian%2C+T">Tian Tian</a>, <a href="/search/quant-ph?searchtype=author&query=Yao%2C+H">Hepeng Yao</a>, <a href="/search/quant-ph?searchtype=author&query=Hu%2C+J">Jiazhong Hu</a>, <a href="/search/quant-ph?searchtype=author&query=Chen%2C+Y">Yu Chen</a>, <a href="/search/quant-ph?searchtype=author&query=Chen%2C+W">Wenlan Chen</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2309.10257v1-abstract-short" style="display: inline;"> Dissipation is unavoidable in quantum systems. It usually induces decoherences and changes quantum correlations. To access the information of strongly correlated quantum matters, one has to overcome or suppress dissipation to extract out the underlying quantum phenomena. However, here we find an opposite effect that dissipation can be utilized as a powerful tool to probe the intrinsic correlations… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.10257v1-abstract-full').style.display = 'inline'; document.getElementById('2309.10257v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2309.10257v1-abstract-full" style="display: none;"> Dissipation is unavoidable in quantum systems. It usually induces decoherences and changes quantum correlations. To access the information of strongly correlated quantum matters, one has to overcome or suppress dissipation to extract out the underlying quantum phenomena. However, here we find an opposite effect that dissipation can be utilized as a powerful tool to probe the intrinsic correlations of quantum many-body systems. Applying highly-controllable dissipation in ultracold atomic systems, we observe a universal dissipative dynamics in strongly correlated one-dimensional quantum gases. The total particle number of this system follows a universal stretched-exponential decay, and the stretched exponent measures the anomalous dimension of the spectral function, a critical exponent characterizing strong quantum fluctuations of this system. This method could have broad applications in detecting strongly correlated features, including spin-charge separations and Fermi arcs in quantum materials. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.10257v1-abstract-full').style.display = 'none'; document.getElementById('2309.10257v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Physics (2025) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.16640">arXiv:2306.16640</a> <span> [<a href="https://arxiv.org/pdf/2306.16640">pdf</a>, <a href="https://arxiv.org/format/2306.16640">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1063/5.0157862">10.1063/5.0157862 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Ultraviolet photon-counting single-pixel imaging </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun-Tian Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Yu%2C+C">Chao Yu</a>, <a href="/search/quant-ph?searchtype=author&query=Li%2C+W">Wenwen Li</a>, <a href="/search/quant-ph?searchtype=author&query=Li%2C+Z">Zheng-Ping Li</a>, <a href="/search/quant-ph?searchtype=author&query=Lu%2C+H">Hai Lu</a>, <a href="/search/quant-ph?searchtype=author&query=Zhang%2C+R">Rong Zhang</a>, <a href="/search/quant-ph?searchtype=author&query=Zhang%2C+J">Jun Zhang</a>, <a href="/search/quant-ph?searchtype=author&query=Xu%2C+F">Feihu Xu</a>, <a href="/search/quant-ph?searchtype=author&query=Pan%2C+J">Jian-Wei Pan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2306.16640v1-abstract-short" style="display: inline;"> We demonstrate photon-counting single-pixel imaging in the ultraviolet region. Toward this target, we develop a high-performance compact single-photon detector based on a 4H-SiC single-photon avalanche diode (SPAD), where a tailored readout circuit with active hold-off time is designed to restrain detector noise and operate the SPAD in free-running mode. We use structured illumination to reconstru… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.16640v1-abstract-full').style.display = 'inline'; document.getElementById('2306.16640v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.16640v1-abstract-full" style="display: none;"> We demonstrate photon-counting single-pixel imaging in the ultraviolet region. Toward this target, we develop a high-performance compact single-photon detector based on a 4H-SiC single-photon avalanche diode (SPAD), where a tailored readout circuit with active hold-off time is designed to restrain detector noise and operate the SPAD in free-running mode. We use structured illumination to reconstruct 192$\times$192 compressed images at a 4 fps frame rate. To show the superior capability of ultraviolet characteristics, we use our single-pixel imaging system to identify and distinguish different transparent objects under low-intensity irradiation, and image ultraviolet light sources. The results provide a practical solution for general ultraviolet imaging applications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.16640v1-abstract-full').style.display = 'none'; document.getElementById('2306.16640v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 5 figures, accepted for publication in Applied Physics Letters</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Appl. Phys. Lett. 123, 024005 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.13445">arXiv:2305.13445</a> <span> [<a href="https://arxiv.org/pdf/2305.13445">pdf</a>, <a href="https://arxiv.org/format/2305.13445">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41567-024-02423-1">10.1038/s41567-024-02423-1 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Quantum state manipulation and cooling of ultracold molecules </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Langen%2C+T">Tim Langen</a>, <a href="/search/quant-ph?searchtype=author&query=Valtolina%2C+G">Giacomo Valtolina</a>, <a href="/search/quant-ph?searchtype=author&query=Wang%2C+D">Dajun Wang</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2305.13445v2-abstract-short" style="display: inline;"> An increasingly large variety of molecular species are being cooled down to low energies in recent years, and innovative ideas and powerful techniques continue to emerge to gain ever more precise control of molecular motion. In this brief review we focus our discussions on two widely employed cooling techniques that have brought molecular gases into the quantum regime: association of ultracold ato… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.13445v2-abstract-full').style.display = 'inline'; document.getElementById('2305.13445v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.13445v2-abstract-full" style="display: none;"> An increasingly large variety of molecular species are being cooled down to low energies in recent years, and innovative ideas and powerful techniques continue to emerge to gain ever more precise control of molecular motion. In this brief review we focus our discussions on two widely employed cooling techniques that have brought molecular gases into the quantum regime: association of ultracold atomic gases into quantum gases of molecules and direct laser cooling of molecules. These advances have brought into reality our capability to prepare and manipulate both internal and external states of molecules quantum mechanically, opening the field of cold molecules to a wide range of scientific explorations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.13445v2-abstract-full').style.display = 'none'; document.getElementById('2305.13445v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Physics (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.05324">arXiv:2305.05324</a> <span> [<a href="https://arxiv.org/pdf/2305.05324">pdf</a>, <a href="https://arxiv.org/format/2305.05324">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Ergodicity breaking in rapidly rotating C60 fullerenes </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Liu%2C+L+R">Lee R. Liu</a>, <a href="/search/quant-ph?searchtype=author&query=Rosenberg%2C+D">Dina Rosenberg</a>, <a href="/search/quant-ph?searchtype=author&query=Changala%2C+P+B">P. Bryan Changala</a>, <a href="/search/quant-ph?searchtype=author&query=Crowley%2C+P+J+D">Philip J. D. Crowley</a>, <a href="/search/quant-ph?searchtype=author&query=Nesbitt%2C+D+J">David J. Nesbitt</a>, <a href="/search/quant-ph?searchtype=author&query=Yao%2C+N+Y">Norman Y. Yao</a>, <a href="/search/quant-ph?searchtype=author&query=Tscherbul%2C+T">Timur Tscherbul</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2305.05324v1-abstract-short" style="display: inline;"> Ergodicity, the central tenet of statistical mechanics, requires that an isolated system will explore all of its available phase space permitted by energetic and symmetry constraints. Mechanisms for violating ergodicity are of great interest for probing non-equilibrium matter and for protecting quantum coherence in complex systems. For decades, polyatomic molecules have served as an intriguing and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.05324v1-abstract-full').style.display = 'inline'; document.getElementById('2305.05324v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.05324v1-abstract-full" style="display: none;"> Ergodicity, the central tenet of statistical mechanics, requires that an isolated system will explore all of its available phase space permitted by energetic and symmetry constraints. Mechanisms for violating ergodicity are of great interest for probing non-equilibrium matter and for protecting quantum coherence in complex systems. For decades, polyatomic molecules have served as an intriguing and challenging platform for probing ergodicity breaking in vibrational energy transport, particularly in the context of controlling chemical reactions. Here, we report the observation of rotational ergodicity breaking in an unprecedentedly large and symmetric molecule, 12C60. This is facilitated by the first ever observation of icosahedral ro-vibrational fine structure in any physical system, first predicted for 12C60 in 1986. The ergodicity breaking exhibits several surprising features: first, there are multiple transitions between ergodic and non-ergodic regimes as the total angular momentum is increased, and second, they occur well below the traditional vibrational ergodicity threshold. These peculiar dynamics result from the molecules' unique combination of symmetry, size, and rigidity, highlighting the potential of fullerenes to uncover emergent phenomena in mesoscopic quantum systems. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.05324v1-abstract-full').style.display = 'none'; document.getElementById('2305.05324v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2304.12612">arXiv:2304.12612</a> <span> [<a href="https://arxiv.org/pdf/2304.12612">pdf</a>, <a href="https://arxiv.org/ps/2304.12612">ps</a>, <a href="https://arxiv.org/format/2304.12612">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.107.184425">10.1103/PhysRevB.107.184425 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Bose-Einstein condensations of magnons in quantum magnets with spin-orbit coupling in a Zeeman field </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Sun%2C+F">Fadi Sun</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jinwu Ye</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2304.12612v1-abstract-short" style="display: inline;"> We study the response of a quantum magnet with spin-orbit coupling (SOC) to a Zeeman field by constructing effective actions and performing Renormalization Group (RG) analysis. There are several novel classes of quantum phase transitions at a low $ h_{c1} $ and an upper critical field $ h_{c2} $ driven by magnon condensations at commensurate (C-) or in-commensurate (IC-) momenta $ 0 < k_0 < 蟺$. Th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.12612v1-abstract-full').style.display = 'inline'; document.getElementById('2304.12612v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2304.12612v1-abstract-full" style="display: none;"> We study the response of a quantum magnet with spin-orbit coupling (SOC) to a Zeeman field by constructing effective actions and performing Renormalization Group (RG) analysis. There are several novel classes of quantum phase transitions at a low $ h_{c1} $ and an upper critical field $ h_{c2} $ driven by magnon condensations at commensurate (C-) or in-commensurate (IC-) momenta $ 0 < k_0 < 蟺$. The intermediate IC- Skyrmion crystal (IC-SkX) phase is controlled by a line of fixed points in the RG flows labeled by $ k_0 $. We derive the relations between the quantum spin and the order parameters of the effective actions which determine the spin-orbital structures of the IC-SkX phase. We also analyze the operator contents near $ h_{c1} $ and $ h_{c2} $ which determine the exotic excitation spectra inside the IC-SkX. The intrinsic differences between the magnon condensations at the C- and IC- momenta are explored. The two critical fields $ h_{c1} < h_{c2} $ and the intermediate IC-SkX phase could be a generic feature to any quantum magnets with SOC in a Zeeman field. Experimental implications to some materials or cold atom systems with SOC in a Zeeman field are presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.12612v1-abstract-full').style.display = 'none'; document.getElementById('2304.12612v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 April, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 PRB pages, 8 .eps figures, accepted for publication in Phys. Rev. B. arXiv admin note: text overlap with arXiv:2011.11287</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 107, 184425, Published 12 May 2023 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2303.08078">arXiv:2303.08078</a> <span> [<a href="https://arxiv.org/pdf/2303.08078">pdf</a>, <a href="https://arxiv.org/format/2303.08078">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41586-023-06360-6">10.1038/s41586-023-06360-6 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Realizing spin squeezing with Rydberg interactions in a programmable optical clock </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Eckner%2C+W+J">William J. Eckner</a>, <a href="/search/quant-ph?searchtype=author&query=Oppong%2C+N+D">Nelson Darkwah Oppong</a>, <a href="/search/quant-ph?searchtype=author&query=Cao%2C+A">Alec Cao</a>, <a href="/search/quant-ph?searchtype=author&query=Young%2C+A+W">Aaron W. Young</a>, <a href="/search/quant-ph?searchtype=author&query=Milner%2C+W+R">William R. Milner</a>, <a href="/search/quant-ph?searchtype=author&query=Robinson%2C+J+M">John M. Robinson</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Kaufman%2C+A+M">Adam M. Kaufman</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2303.08078v2-abstract-short" style="display: inline;"> Neutral-atom arrays trapped in optical potentials are a powerful platform for studying quantum physics, combining precise single-particle control and detection with a range of tunable entangling interactions. For example, these capabilities have been leveraged for state-of-the-art frequency metrology as well as microscopic studies of entangled many-particle states. In this work, we combine these a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.08078v2-abstract-full').style.display = 'inline'; document.getElementById('2303.08078v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2303.08078v2-abstract-full" style="display: none;"> Neutral-atom arrays trapped in optical potentials are a powerful platform for studying quantum physics, combining precise single-particle control and detection with a range of tunable entangling interactions. For example, these capabilities have been leveraged for state-of-the-art frequency metrology as well as microscopic studies of entangled many-particle states. In this work, we combine these applications to realize spin squeezing - a widely studied operation for producing metrologically useful entanglement - in an optical atomic clock based on a programmable array of interacting optical qubits. In this first demonstration of Rydberg-mediated squeezing with a neutral-atom optical clock, we generate states that have almost 4 dB of metrological gain. Additionally, we perform a synchronous frequency comparison between independent squeezed states and observe a fractional frequency stability of $1.087(1)\times 10^{-15}$ at one-second averaging time, which is 1.94(1) dB below the standard quantum limit, and reaches a fractional precision at the $10^{-17}$ level during a half-hour measurement. We further leverage the programmable control afforded by optical tweezer arrays to apply local phase shifts in order to explore spin squeezing in measurements that operate beyond the relative coherence time with the optical local oscillator. The realization of this spin-squeezing protocol in a programmable atom-array clock opens the door to a wide range of quantum-information inspired techniques for optimal phase estimation and Heisenberg-limited optical atomic clocks. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.08078v2-abstract-full').style.display = 'none'; document.getElementById('2303.08078v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 July, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages, 4 figures; Supplementary Information</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature 621, 734 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2303.06985">arXiv:2303.06985</a> <span> [<a href="https://arxiv.org/pdf/2303.06985">pdf</a>, <a href="https://arxiv.org/format/2303.06985">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Lattice">hep-lat</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1073/pnas.2304294120">10.1073/pnas.2304294120 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Fermionic quantum processing with programmable neutral atom arrays </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Gonz%C3%A1lez-Cuadra%2C+D">Daniel Gonz谩lez-Cuadra</a>, <a href="/search/quant-ph?searchtype=author&query=Bluvstein%2C+D">Dolev Bluvstein</a>, <a href="/search/quant-ph?searchtype=author&query=Kalinowski%2C+M">Marcin Kalinowski</a>, <a href="/search/quant-ph?searchtype=author&query=Kaubruegger%2C+R">Raphael Kaubruegger</a>, <a href="/search/quant-ph?searchtype=author&query=Maskara%2C+N">Nishad Maskara</a>, <a href="/search/quant-ph?searchtype=author&query=Naldesi%2C+P">Piero Naldesi</a>, <a href="/search/quant-ph?searchtype=author&query=Zache%2C+T+V">Torsten V. Zache</a>, <a href="/search/quant-ph?searchtype=author&query=Kaufman%2C+A+M">Adam M. Kaufman</a>, <a href="/search/quant-ph?searchtype=author&query=Lukin%2C+M+D">Mikhail D. Lukin</a>, <a href="/search/quant-ph?searchtype=author&query=Pichler%2C+H">Hannes Pichler</a>, <a href="/search/quant-ph?searchtype=author&query=Vermersch%2C+B">Beno卯t Vermersch</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Zoller%2C+P">Peter Zoller</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2303.06985v1-abstract-short" style="display: inline;"> Simulating the properties of many-body fermionic systems is an outstanding computational challenge relevant to material science, quantum chemistry, and particle physics. Although qubit-based quantum computers can potentially tackle this problem more efficiently than classical devices, encoding non-local fermionic statistics introduces an overhead in the required resources, limiting their applicabi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.06985v1-abstract-full').style.display = 'inline'; document.getElementById('2303.06985v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2303.06985v1-abstract-full" style="display: none;"> Simulating the properties of many-body fermionic systems is an outstanding computational challenge relevant to material science, quantum chemistry, and particle physics. Although qubit-based quantum computers can potentially tackle this problem more efficiently than classical devices, encoding non-local fermionic statistics introduces an overhead in the required resources, limiting their applicability on near-term architectures. In this work, we present a fermionic quantum processor, where fermionic models are locally encoded in a fermionic register and simulated in a hardware-efficient manner using fermionic gates. We consider in particular fermionic atoms in programmable tweezer arrays and develop different protocols to implement non-local tunneling gates, guaranteeing Fermi statistics at the hardware level. We use this gate set, together with Rydberg-mediated interaction gates, to find efficient circuit decompositions for digital and variational quantum simulation algorithms, illustrated here for molecular energy estimation. Finally, we consider a combined fermion-qubit architecture, where both the motional and internal degrees of freedom of the atoms are harnessed to efficiently implement quantum phase estimation, as well as to simulate lattice gauge theory dynamics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.06985v1-abstract-full').style.display = 'none'; document.getElementById('2303.06985v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Proc. Natl. Acad. Sci. 120, e2304294120 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2303.05613">arXiv:2303.05613</a> <span> [<a href="https://arxiv.org/pdf/2303.05613">pdf</a>, <a href="https://arxiv.org/format/2303.05613">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Observation of mHz-level cooperative Lamb shifts in an optical atomic clock </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Hutson%2C+R+B">Ross B. Hutson</a>, <a href="/search/quant-ph?searchtype=author&query=Milner%2C+W+R">William R. Milner</a>, <a href="/search/quant-ph?searchtype=author&query=Yan%2C+L">Lingfeng Yan</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Sanner%2C+C">Christian Sanner</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2303.05613v1-abstract-short" style="display: inline;"> We report on the direct observation of resonant electric dipole-dipole interactions in a cubic array of atoms in the many-excitation limit. The interactions, mediated by single-atom couplings to the shared electromagnetic vacuum, are shown to produce spatially-dependent cooperative Lamb shifts when spectroscopically interrogating the mHz-wide optical clock transition in strontium-87. We show that… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.05613v1-abstract-full').style.display = 'inline'; document.getElementById('2303.05613v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2303.05613v1-abstract-full" style="display: none;"> We report on the direct observation of resonant electric dipole-dipole interactions in a cubic array of atoms in the many-excitation limit. The interactions, mediated by single-atom couplings to the shared electromagnetic vacuum, are shown to produce spatially-dependent cooperative Lamb shifts when spectroscopically interrogating the mHz-wide optical clock transition in strontium-87. We show that the ensemble-averaged shifts can be suppressed below the level of evaluated systematic uncertainties for state-of-the-art optical atomic clocks. Additionally, we demonstrate that excitation of the atomic dipoles near a Bragg angle can enhance these effects by nearly an order of magnitude compared to non-resonant geometries. Given the remarkable precision of frequency measurements and the high accuracy of the modeled response, our work demonstrates that such a clock is a novel platform for studies of the quantum many-body physics of spins with long-range interactions mediated by propagating photons. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.05613v1-abstract-full').style.display = 'none'; document.getElementById('2303.05613v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2211.08621">arXiv:2211.08621</a> <span> [<a href="https://arxiv.org/pdf/2211.08621">pdf</a>, <a href="https://arxiv.org/format/2211.08621">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> </div> <p class="title is-5 mathjax"> Direct comparison of two spin squeezed optical clocks below the quantum projection noise limit </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Robinson%2C+J+M">John M Robinson</a>, <a href="/search/quant-ph?searchtype=author&query=Miklos%2C+M">Maya Miklos</a>, <a href="/search/quant-ph?searchtype=author&query=Tso%2C+Y+M">Yee Ming Tso</a>, <a href="/search/quant-ph?searchtype=author&query=Kennedy%2C+C+J">Colin J. Kennedy</a>, <a href="/search/quant-ph?searchtype=author&query=Bothwell%2C+T">Tobias Bothwell</a>, <a href="/search/quant-ph?searchtype=author&query=Kedar%2C+D">Dhruv Kedar</a>, <a href="/search/quant-ph?searchtype=author&query=Thompson%2C+J+K">James K. Thompson</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2211.08621v2-abstract-short" style="display: inline;"> Building scalable quantum systems that demonstrate genuine performance enhancement based on entanglement is a major scientific goal for fields including computing, networking, simulations, and metrology. The tremendous challenge arises from the fragility of entanglement in increasingly larger sized quantum systems. Optical atomic clocks utilizing a large number of atoms have pushed the frontier of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.08621v2-abstract-full').style.display = 'inline'; document.getElementById('2211.08621v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2211.08621v2-abstract-full" style="display: none;"> Building scalable quantum systems that demonstrate genuine performance enhancement based on entanglement is a major scientific goal for fields including computing, networking, simulations, and metrology. The tremendous challenge arises from the fragility of entanglement in increasingly larger sized quantum systems. Optical atomic clocks utilizing a large number of atoms have pushed the frontier of measurement science, building on precise engineering of quantum states and control of atomic interactions. However, today's state-of-the-art optical atomic clocks are limited by the quantum projection noise (QPN) defined by many uncorrelated atoms. Pioneering work on producing spin squeezed states of atoms has shown a path towards integrating entanglement into the best performing clocks. However, to directly demonstrate advantage of quantum entanglement in a working clock we must prevent backaction effects that degrade quantum coherence and introduce uncontrolled perturbations, as well as minimize the influence of technical noise arising from the interrogating clock laser. Here we present a new optical clock platform integrated with collective strong-coupling cavity QED for quantum non-demolition (QND) measurement. Optimizing the competition between spin measurement precision and loss of coherence, we measure a Wineland parameter of -1.8(7) dB for 1.9x10$^4$ atoms, thus verifying the presence of entanglement. Furthermore, a moving lattice allows the cavity to individually address two independent sub-ensembles, enabling us to spin squeeze two clock ensembles successively and compare their performance. This differential comparison between the two squeezed clocks directly verifies enhanced clock stability of 2.0(3) dB below QPN, and 0.6(3) dB above the standard quantum limit (SQL), at the measurement precision level of 10$^{-17}$, without subtracting any technical noise contributions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.08621v2-abstract-full').style.display = 'none'; document.getElementById('2211.08621v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 November, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 November, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 6 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2210.14757">arXiv:2210.14757</a> <span> [<a href="https://arxiv.org/pdf/2210.14757">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Accelerating Progress Towards Practical Quantum Advantage: The Quantum Technology Demonstration Project Roadmap </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Alsing%2C+P">Paul Alsing</a>, <a href="/search/quant-ph?searchtype=author&query=Battle%2C+P">Phil Battle</a>, <a href="/search/quant-ph?searchtype=author&query=Bienfang%2C+J+C">Joshua C. Bienfang</a>, <a href="/search/quant-ph?searchtype=author&query=Borders%2C+T">Tammie Borders</a>, <a href="/search/quant-ph?searchtype=author&query=Brower-Thomas%2C+T">Tina Brower-Thomas</a>, <a href="/search/quant-ph?searchtype=author&query=Carr%2C+L+D">Lincoln D. Carr</a>, <a href="/search/quant-ph?searchtype=author&query=Chong%2C+F">Fred Chong</a>, <a href="/search/quant-ph?searchtype=author&query=Dadras%2C+S">Siamak Dadras</a>, <a href="/search/quant-ph?searchtype=author&query=DeMarco%2C+B">Brian DeMarco</a>, <a href="/search/quant-ph?searchtype=author&query=Deutsch%2C+I">Ivan Deutsch</a>, <a href="/search/quant-ph?searchtype=author&query=Figueroa%2C+E">Eden Figueroa</a>, <a href="/search/quant-ph?searchtype=author&query=Freedman%2C+D">Danna Freedman</a>, <a href="/search/quant-ph?searchtype=author&query=Everitt%2C+H">Henry Everitt</a>, <a href="/search/quant-ph?searchtype=author&query=Gauthier%2C+D">Daniel Gauthier</a>, <a href="/search/quant-ph?searchtype=author&query=Johnston-Halperin%2C+E">Ezekiel Johnston-Halperin</a>, <a href="/search/quant-ph?searchtype=author&query=Kim%2C+J">Jungsang Kim</a>, <a href="/search/quant-ph?searchtype=author&query=Kira%2C+M">Mackillo Kira</a>, <a href="/search/quant-ph?searchtype=author&query=Kumar%2C+P">Prem Kumar</a>, <a href="/search/quant-ph?searchtype=author&query=Kwiat%2C+P">Paul Kwiat</a>, <a href="/search/quant-ph?searchtype=author&query=Lekki%2C+J">John Lekki</a>, <a href="/search/quant-ph?searchtype=author&query=Loiacono%2C+A">Anjul Loiacono</a>, <a href="/search/quant-ph?searchtype=author&query=Loncar%2C+M">Marko Loncar</a>, <a href="/search/quant-ph?searchtype=author&query=Lowell%2C+J+R">John R. Lowell</a>, <a href="/search/quant-ph?searchtype=author&query=Lukin%2C+M">Mikhail Lukin</a>, <a href="/search/quant-ph?searchtype=author&query=Merzbacher%2C+C">Celia Merzbacher</a> , et al. (10 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2210.14757v3-abstract-short" style="display: inline;"> Quantum information science and technology (QIST) is a critical and emerging technology with the potential for enormous world impact and is currently invested in by over 40 nations. To bring these large-scale investments to fruition and bridge the lower technology readiness levels (TRLs) of fundamental research at universities to the high TRLs necessary to realize the promise of practical quantum… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.14757v3-abstract-full').style.display = 'inline'; document.getElementById('2210.14757v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2210.14757v3-abstract-full" style="display: none;"> Quantum information science and technology (QIST) is a critical and emerging technology with the potential for enormous world impact and is currently invested in by over 40 nations. To bring these large-scale investments to fruition and bridge the lower technology readiness levels (TRLs) of fundamental research at universities to the high TRLs necessary to realize the promise of practical quantum advantage accessible to industry and the public, we present a roadmap for Quantum Technology Demonstration Projects (QTDPs). Such QTDPs, focused on intermediate TRLs, are large-scale public-private partnerships with a high probability of translation from laboratory to practice. They create technology demonstrating a clear 'quantum advantage' for science breakthroughs that are user-motivated and will provide access to a broad and diverse community of scientific users. Successful implementation of a program of QTDPs will have large positive economic impacts. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.14757v3-abstract-full').style.display = 'none'; document.getElementById('2210.14757v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Updated title and abstract</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2208.02216">arXiv:2208.02216</a> <span> [<a href="https://arxiv.org/pdf/2208.02216">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41586-022-05479-2">10.1038/s41586-022-05479-2 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Tunable itinerant spin dynamics with polar molecules </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Li%2C+J">Jun-Ru Li</a>, <a href="/search/quant-ph?searchtype=author&query=Matsuda%2C+K">Kyle Matsuda</a>, <a href="/search/quant-ph?searchtype=author&query=Miller%2C+C">Calder Miller</a>, <a href="/search/quant-ph?searchtype=author&query=Carroll%2C+A+N">Annette N. Carroll</a>, <a href="/search/quant-ph?searchtype=author&query=Tobias%2C+W+G">William G. Tobias</a>, <a href="/search/quant-ph?searchtype=author&query=Higgins%2C+J+S">Jacob S. Higgins</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2208.02216v2-abstract-short" style="display: inline;"> Strongly interacting spins underlie many intriguing phenomena and applications ranging from magnetism to quantum information processing. Interacting spins combined with motion display exotic spin transport phenomena, such as superfluidity arising from pairing of spins induced by spin attraction. To understand these complex phenomena, an interacting spin system with high controllability is desired.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.02216v2-abstract-full').style.display = 'inline'; document.getElementById('2208.02216v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2208.02216v2-abstract-full" style="display: none;"> Strongly interacting spins underlie many intriguing phenomena and applications ranging from magnetism to quantum information processing. Interacting spins combined with motion display exotic spin transport phenomena, such as superfluidity arising from pairing of spins induced by spin attraction. To understand these complex phenomena, an interacting spin system with high controllability is desired. Quantum spin dynamics have been studied on different platforms with varying capabilities. Here we demonstrate tunable itinerant spin dynamics enabled by dipolar interactions using a gas of potassium-rubidium molecules confined to two-dimensional planes, where a spin-1/2 system is encoded into the molecular rotational levels. The dipolar interaction gives rise to a shift of the rotational transition frequency and a collision-limited Ramsey contrast decay that emerges from the coupled spin and motion. Both the Ising and spin exchange interactions are precisely tuned by varying the strength and orientation of an electric field, as well as the internal molecular state. This full tunability enables both static and dynamical control of the spin Hamiltonian, allowing reversal of the coherent spin dynamics. Our work establishes an interacting spin platform that allows for exploration of many-body spin dynamics and spin-motion physics utilizing the strong, tunable dipolar interaction. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.02216v2-abstract-full').style.display = 'none'; document.getElementById('2208.02216v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 November, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 August, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">22 pages, including 4 + 2 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2206.02381">arXiv:2206.02381</a> <span> [<a href="https://arxiv.org/pdf/2206.02381">pdf</a>, <a href="https://arxiv.org/format/2206.02381">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PRXQuantum.3.030332">10.1103/PRXQuantum.3.030332 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Collision-induced C_60 rovibrational relaxation probed by state-resolved nonlinear spectroscopy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Liu%2C+L+R">Lee R. Liu</a>, <a href="/search/quant-ph?searchtype=author&query=Changala%2C+P+B">P. Bryan Changala</a>, <a href="/search/quant-ph?searchtype=author&query=Weichman%2C+M+L">Marissa L. Weichman</a>, <a href="/search/quant-ph?searchtype=author&query=Liang%2C+Q">Qizhong Liang</a>, <a href="/search/quant-ph?searchtype=author&query=Toscano%2C+J">Jutta Toscano</a>, <a href="/search/quant-ph?searchtype=author&query=Klos%2C+J">Jacek Klos</a>, <a href="/search/quant-ph?searchtype=author&query=Kotochigova%2C+S">Svetlana Kotochigova</a>, <a href="/search/quant-ph?searchtype=author&query=Nesbitt%2C+D+J">David J. Nesbitt</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2206.02381v2-abstract-short" style="display: inline;"> Quantum state-resolved spectroscopy was recently achieved for C60 molecules when cooled by buffer gas collisions and probed with a midinfrared frequency comb. This rovibrational quantum state resolution for the largest molecule on record is facilitated by the remarkable symmetry and rigidity of C60, which also present new opportunities and challenges to explore energy transfer between quantum stat… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.02381v2-abstract-full').style.display = 'inline'; document.getElementById('2206.02381v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2206.02381v2-abstract-full" style="display: none;"> Quantum state-resolved spectroscopy was recently achieved for C60 molecules when cooled by buffer gas collisions and probed with a midinfrared frequency comb. This rovibrational quantum state resolution for the largest molecule on record is facilitated by the remarkable symmetry and rigidity of C60, which also present new opportunities and challenges to explore energy transfer between quantum states in this many-atom system. Here we combine state-specific optical pumping, buffer gas collisions, and ultrasensitive intracavity nonlinear spectroscopy to initiate and probe the rotation-vibration energy transfer and relaxation. This approach provides the first detailed characterization of C60 collisional energy transfer for a variety of collision partners, and determines the rotational and vibrational inelastic collision cross sections. These results compare well with our theoretical modeling of the collisions, and establish a route towards quantum state control of a new class of unprecedentedly large molecules. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.02381v2-abstract-full').style.display = 'none'; document.getElementById('2206.02381v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> PRX Quantum 3, 030332 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2205.00190">arXiv:2205.00190</a> <span> [<a href="https://arxiv.org/pdf/2205.00190">pdf</a>, <a href="https://arxiv.org/ps/2205.00190">ps</a>, <a href="https://arxiv.org/format/2205.00190">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.130.143002">10.1103/PhysRevLett.130.143002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Robust nuclear spin entanglement via dipolar interactions in polar molecules </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Tscherbul%2C+T+V">Timur V. Tscherbul</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Rey%2C+A+M">Ana Maria Rey</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2205.00190v2-abstract-short" style="display: inline;"> We propose a general protocol for on-demand generation of robust entangled states of nuclear and/or electron spins of ultracold $^1危$ and $^2危$ polar molecules using electric dipolar interactions. By encoding a spin-1/2 degree of freedom in a combined set of spin and rotational molecular levels, we theoretically demonstrate the emergence of effective spin-spin interactions of the Ising and XXZ for… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2205.00190v2-abstract-full').style.display = 'inline'; document.getElementById('2205.00190v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2205.00190v2-abstract-full" style="display: none;"> We propose a general protocol for on-demand generation of robust entangled states of nuclear and/or electron spins of ultracold $^1危$ and $^2危$ polar molecules using electric dipolar interactions. By encoding a spin-1/2 degree of freedom in a combined set of spin and rotational molecular levels, we theoretically demonstrate the emergence of effective spin-spin interactions of the Ising and XXZ forms, enabled by efficient magnetic control over electric dipolar interactions. We show how to use these interactions to create long-lived cluster and squeezed spin states. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2205.00190v2-abstract-full').style.display = 'none'; document.getElementById('2205.00190v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 April, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 April, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 130, 143002 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2203.14915">arXiv:2203.14915</a> <span> [<a href="https://arxiv.org/pdf/2203.14915">pdf</a>, <a href="https://arxiv.org/format/2203.14915">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Cosmology and Nongalactic Astrophysics">astro-ph.CO</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> New Horizons: Scalar and Vector Ultralight Dark Matter </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Antypas%2C+D">D. Antypas</a>, <a href="/search/quant-ph?searchtype=author&query=Banerjee%2C+A">A. Banerjee</a>, <a href="/search/quant-ph?searchtype=author&query=Bartram%2C+C">C. Bartram</a>, <a href="/search/quant-ph?searchtype=author&query=Baryakhtar%2C+M">M. Baryakhtar</a>, <a href="/search/quant-ph?searchtype=author&query=Betz%2C+J">J. Betz</a>, <a href="/search/quant-ph?searchtype=author&query=Bollinger%2C+J+J">J. J. Bollinger</a>, <a href="/search/quant-ph?searchtype=author&query=Boutan%2C+C">C. Boutan</a>, <a href="/search/quant-ph?searchtype=author&query=Bowring%2C+D">D. Bowring</a>, <a href="/search/quant-ph?searchtype=author&query=Budker%2C+D">D. Budker</a>, <a href="/search/quant-ph?searchtype=author&query=Carney%2C+D">D. Carney</a>, <a href="/search/quant-ph?searchtype=author&query=Carosi%2C+G">G. Carosi</a>, <a href="/search/quant-ph?searchtype=author&query=Chaudhuri%2C+S">S. Chaudhuri</a>, <a href="/search/quant-ph?searchtype=author&query=Cheong%2C+S">S. Cheong</a>, <a href="/search/quant-ph?searchtype=author&query=Chou%2C+A">A. Chou</a>, <a href="/search/quant-ph?searchtype=author&query=Chowdhury%2C+M+D">M. D. Chowdhury</a>, <a href="/search/quant-ph?searchtype=author&query=Co%2C+R+T">R. T. Co</a>, <a href="/search/quant-ph?searchtype=author&query=L%C3%B3pez-Urrutia%2C+J+R+C">J. R. Crespo L贸pez-Urrutia</a>, <a href="/search/quant-ph?searchtype=author&query=Demarteau%2C+M">M. Demarteau</a>, <a href="/search/quant-ph?searchtype=author&query=DePorzio%2C+N">N. DePorzio</a>, <a href="/search/quant-ph?searchtype=author&query=Derbin%2C+A+V">A. V. Derbin</a>, <a href="/search/quant-ph?searchtype=author&query=Deshpande%2C+T">T. Deshpande</a>, <a href="/search/quant-ph?searchtype=author&query=Chowdhury%2C+M+D">M. D. Chowdhury</a>, <a href="/search/quant-ph?searchtype=author&query=Di+Luzio%2C+L">L. Di Luzio</a>, <a href="/search/quant-ph?searchtype=author&query=Diaz-Morcillo%2C+A">A. Diaz-Morcillo</a>, <a href="/search/quant-ph?searchtype=author&query=Doyle%2C+J+M">J. M. Doyle</a> , et al. (104 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2203.14915v1-abstract-short" style="display: inline;"> The last decade has seen unprecedented effort in dark matter model building at all mass scales coupled with the design of numerous new detection strategies. Transformative advances in quantum technologies have led to a plethora of new high-precision quantum sensors and dark matter detection strategies for ultralight ($<10\,$eV) bosonic dark matter that can be described by an oscillating classical,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.14915v1-abstract-full').style.display = 'inline'; document.getElementById('2203.14915v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.14915v1-abstract-full" style="display: none;"> The last decade has seen unprecedented effort in dark matter model building at all mass scales coupled with the design of numerous new detection strategies. Transformative advances in quantum technologies have led to a plethora of new high-precision quantum sensors and dark matter detection strategies for ultralight ($<10\,$eV) bosonic dark matter that can be described by an oscillating classical, largely coherent field. This white paper focuses on searches for wavelike scalar and vector dark matter candidates. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.14915v1-abstract-full').style.display = 'none'; document.getElementById('2203.14915v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Snowmass 2021 White Paper</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.12238">arXiv:2109.12238</a> <span> [<a href="https://arxiv.org/pdf/2109.12238">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41586-021-04349-7">10.1038/s41586-021-04349-7 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Resolving the gravitational redshift within a millimeter atomic sample </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Bothwell%2C+T">Tobias Bothwell</a>, <a href="/search/quant-ph?searchtype=author&query=Kennedy%2C+C+J">Colin J. Kennedy</a>, <a href="/search/quant-ph?searchtype=author&query=Aeppli%2C+A">Alexander Aeppli</a>, <a href="/search/quant-ph?searchtype=author&query=Kedar%2C+D">Dhruv Kedar</a>, <a href="/search/quant-ph?searchtype=author&query=Robinson%2C+J+M">John M. Robinson</a>, <a href="/search/quant-ph?searchtype=author&query=Oelker%2C+E">Eric Oelker</a>, <a href="/search/quant-ph?searchtype=author&query=Staron%2C+A">Alexander Staron</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2109.12238v1-abstract-short" style="display: inline;"> Einstein's theory of general relativity states that clocks at different gravitational potentials tick at different rates - an effect known as the gravitational redshift. As fundamental probes of space and time, atomic clocks have long served to test this prediction at distance scales from 30 centimeters to thousands of kilometers. Ultimately, clocks will study the union of general relativity and q… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.12238v1-abstract-full').style.display = 'inline'; document.getElementById('2109.12238v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.12238v1-abstract-full" style="display: none;"> Einstein's theory of general relativity states that clocks at different gravitational potentials tick at different rates - an effect known as the gravitational redshift. As fundamental probes of space and time, atomic clocks have long served to test this prediction at distance scales from 30 centimeters to thousands of kilometers. Ultimately, clocks will study the union of general relativity and quantum mechanics once they become sensitive to the finite wavefunction of quantum objects oscillating in curved spacetime. Towards this regime, we measure a linear frequency gradient consistent with the gravitational redshift within a single millimeter scale sample of ultracold strontium. Our result is enabled by improving the fractional frequency measurement uncertainty by more than a factor of 10, now reaching 7.6$\times 10^{-21}$. This heralds a new regime of clock operation necessitating intra-sample corrections for gravitational perturbations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.12238v1-abstract-full').style.display = 'none'; document.getElementById('2109.12238v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">27 pages, 4 figures, 1 table</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature 602, 420 - 424 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.00273">arXiv:2109.00273</a> <span> [<a href="https://arxiv.org/pdf/2109.00273">pdf</a>, <a href="https://arxiv.org/format/2109.00273">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Statistical Mechanics">cond-mat.stat-mech</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.scib.2022.12.005">10.1016/j.scib.2022.12.005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Probing quantum many-body correlations by universal ramping dynamics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Liang%2C+L">Libo Liang</a>, <a href="/search/quant-ph?searchtype=author&query=Zheng%2C+W">Wei Zheng</a>, <a href="/search/quant-ph?searchtype=author&query=Yao%2C+R">Ruixiao Yao</a>, <a href="/search/quant-ph?searchtype=author&query=Zheng%2C+Q">Qinpei Zheng</a>, <a href="/search/quant-ph?searchtype=author&query=Yao%2C+Z">Zhiyuan Yao</a>, <a href="/search/quant-ph?searchtype=author&query=Zhou%2C+T">Tian-Gang Zhou</a>, <a href="/search/quant-ph?searchtype=author&query=Huang%2C+Q">Qi Huang</a>, <a href="/search/quant-ph?searchtype=author&query=Zhang%2C+Z">Zhongchi Zhang</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jilai Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Zhou%2C+X">Xiaoji Zhou</a>, <a href="/search/quant-ph?searchtype=author&query=Chen%2C+X">Xuzong Chen</a>, <a href="/search/quant-ph?searchtype=author&query=Chen%2C+W">Wenlan Chen</a>, <a href="/search/quant-ph?searchtype=author&query=Zhai%2C+H">Hui Zhai</a>, <a href="/search/quant-ph?searchtype=author&query=Hu%2C+J">Jiazhong Hu</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2109.00273v2-abstract-short" style="display: inline;"> Ramping a physical parameter is one of the most common experimental protocols in studying a quantum system, and ramping dynamics has been widely used in preparing a quantum state and probing physical properties. Here, we present a novel method of probing quantum many-body correlation by ramping dynamics. We ramp a Hamiltonian parameter to the same target value from different initial values and wit… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.00273v2-abstract-full').style.display = 'inline'; document.getElementById('2109.00273v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.00273v2-abstract-full" style="display: none;"> Ramping a physical parameter is one of the most common experimental protocols in studying a quantum system, and ramping dynamics has been widely used in preparing a quantum state and probing physical properties. Here, we present a novel method of probing quantum many-body correlation by ramping dynamics. We ramp a Hamiltonian parameter to the same target value from different initial values and with different velocities, and we show that the first-order correction on the finite ramping velocity is universal and path-independent, revealing a novel quantum many-body correlation function of the equilibrium phases at the target values. We term this method as the non-adiabatic linear response since this is the leading order correction beyond the adiabatic limit. We demonstrate this method experimentally by studying the Bose-Hubbard model with ultracold atoms in three-dimensional optical lattices. Unlike the conventional linear response that reveals whether the quasi-particle dispersion of a quantum phase is gapped or gapless, this probe is more sensitive to whether the quasi-particle lifetime is long enough such that the quantum phase possesses a well-defined quasi-particle description. In the Bose-Hubbard model, this non-adiabatic linear response is significant in the quantum critical regime where well-defined quasi-particles are absent. And in contrast, this response is vanishingly small in both superfluid and Mott insulators which possess well-defined quasi-particles. Because our proposal uses the most common experimental protocol, we envision that our method can find broad applications in probing various quantum systems. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.00273v2-abstract-full').style.display = 'none'; document.getElementById('2109.00273v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages for main text. Science Bulletin (2022)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Science Bulletin 67, 2550-2556 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2108.02819">arXiv:2108.02819</a> <span> [<a href="https://arxiv.org/pdf/2108.02819">pdf</a>, <a href="https://arxiv.org/format/2108.02819">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.128.093001">10.1103/PhysRevLett.128.093001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Disentangling Pauli blocking of atomic decay from cooperative radiation and atomic motion in a 2D Fermi gas </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Bilitewski%2C+T">Thomas Bilitewski</a>, <a href="/search/quant-ph?searchtype=author&query=Orioli%2C+A+P">Asier Pi帽eiro Orioli</a>, <a href="/search/quant-ph?searchtype=author&query=Sanner%2C+C">Christian Sanner</a>, <a href="/search/quant-ph?searchtype=author&query=Sonderhouse%2C+L">Lindsay Sonderhouse</a>, <a href="/search/quant-ph?searchtype=author&query=Hutson%2C+R+B">Ross B. Hutson</a>, <a href="/search/quant-ph?searchtype=author&query=Yan%2C+L">Lingfeng Yan</a>, <a href="/search/quant-ph?searchtype=author&query=Milner%2C+W+R">William R. Milner</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Rey%2C+A+M">Ana Maria Rey</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2108.02819v1-abstract-short" style="display: inline;"> The observation of Pauli blocking of atomic spontaneous decay via direct measurements of the atomic population requires the use of long-lived atomic gases where quantum statistics, atom recoil and cooperative radiative processes are all relevant. We develop a theoretical framework capable of simultaneously accounting for all these effects in a regime where prior theoretical approaches based on sem… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.02819v1-abstract-full').style.display = 'inline'; document.getElementById('2108.02819v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2108.02819v1-abstract-full" style="display: none;"> The observation of Pauli blocking of atomic spontaneous decay via direct measurements of the atomic population requires the use of long-lived atomic gases where quantum statistics, atom recoil and cooperative radiative processes are all relevant. We develop a theoretical framework capable of simultaneously accounting for all these effects in a regime where prior theoretical approaches based on semi-classical non-interacting or interacting frozen atom approximations fail. We apply it to atoms in a single 2D pancake or arrays of pancakes featuring an effective $螞$ level structure (one excited and two degenerate ground states). We identify a parameter window in which a factor of two extension in the atomic lifetime clearly attributable to Pauli blocking should be experimentally observable in deeply degenerate gases with $\sim 10^{3} $ atoms. Our predictions are supported by observation of a number-dependent excited state decay rate on the ${}^{1}\rm{S_0}-{}^{3}\rm{P_1}$ transition in $^{87}$Sr atoms. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.02819v1-abstract-full').style.display = 'none'; document.getElementById('2108.02819v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 + 6 pages, 4 + 1 figures. comments welcome</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 128, 093001 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2105.10504">arXiv:2105.10504</a> <span> [<a href="https://arxiv.org/pdf/2105.10504">pdf</a>, <a href="https://arxiv.org/format/2105.10504">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevA.103.063322">10.1103/PhysRevA.103.063322 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Floquet Engineering Ultracold Polar Molecules to Simulate Topological Insulators </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Schuster%2C+T">Thomas Schuster</a>, <a href="/search/quant-ph?searchtype=author&query=Flicker%2C+F">Felix Flicker</a>, <a href="/search/quant-ph?searchtype=author&query=Li%2C+M">Ming Li</a>, <a href="/search/quant-ph?searchtype=author&query=Kotochigova%2C+S">Svetlana Kotochigova</a>, <a href="/search/quant-ph?searchtype=author&query=Moore%2C+J+E">Joel E. Moore</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Yao%2C+N+Y">Norman Y. Yao</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2105.10504v1-abstract-short" style="display: inline;"> We present a quantitative, near-term experimental blueprint for the quantum simulation of topological insulators using lattice-trapped ultracold polar molecules. In particular, we focus on the so-called Hopf insulator, which represents a three-dimensional topological state of matter existing outside the conventional tenfold way and crystalline-symmetry-based classifications of topological insulato… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.10504v1-abstract-full').style.display = 'inline'; document.getElementById('2105.10504v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2105.10504v1-abstract-full" style="display: none;"> We present a quantitative, near-term experimental blueprint for the quantum simulation of topological insulators using lattice-trapped ultracold polar molecules. In particular, we focus on the so-called Hopf insulator, which represents a three-dimensional topological state of matter existing outside the conventional tenfold way and crystalline-symmetry-based classifications of topological insulators. Its topology is protected by a \emph{linking number} invariant, which necessitates long-range spin-orbit coupled hoppings for its realization. While these ingredients have so far precluded its realization in solid state systems and other quantum simulation architectures, in a companion manuscript [1901.08597] we predict that Hopf insulators can in fact arise naturally in dipolar interacting systems. Here, we investigate a specific such architecture in lattices of polar molecules, where the effective `spin' is formed from sublattice degrees of freedom. We introduce two techniques that allow one to optimize dipolar Hopf insulators with large band gaps, and which should also be readily applicable to the simulation of other exotic bandstructures. First, we describe the use of Floquet engineering to control the range and functional form of dipolar hoppings and second, we demonstrate that molecular AC polarizabilities (under circularly polarized light) can be used to precisely tune the resonance condition between different rotational states. To verify that this latter technique is amenable to current generation experiments, we calculate from first principles the AC polarizability for $蟽^+$ light for ${}^{40}$K$^{87}$Rb. Finally, we show that experiments are capable of detecting the unconventional topology of the Hopf insulator by varying the termination of the lattice at its edges, which gives rise to three distinct classes of edge mode spectra. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.10504v1-abstract-full').style.display = 'none'; document.getElementById('2105.10504v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15 pages, 8 figures. See companion manuscript arxiv:1901.08597 for an overview on realizing the Hopf insulator via dipolar interactions</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2103.06246">arXiv:2103.06246</a> <span> [<a href="https://arxiv.org/pdf/2103.06246">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41567-021-01329-6">10.1038/s41567-021-01329-6 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Tuning of dipolar interactions and evaporative cooling in a three-dimensional molecular quantum gas </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Li%2C+J">Jun-Ru Li</a>, <a href="/search/quant-ph?searchtype=author&query=Tobias%2C+W+G">William G. Tobias</a>, <a href="/search/quant-ph?searchtype=author&query=Matsuda%2C+K">Kyle Matsuda</a>, <a href="/search/quant-ph?searchtype=author&query=Miller%2C+C">Calder Miller</a>, <a href="/search/quant-ph?searchtype=author&query=Valtolina%2C+G">Giacomo Valtolina</a>, <a href="/search/quant-ph?searchtype=author&query=De+Marco%2C+L">Luigi De Marco</a>, <a href="/search/quant-ph?searchtype=author&query=Wang%2C+R+R+W">Reuben R. W. Wang</a>, <a href="/search/quant-ph?searchtype=author&query=Lassabli%C3%A8re%2C+L">Lucas Lassabli猫re</a>, <a href="/search/quant-ph?searchtype=author&query=Qu%C3%A9m%C3%A9ner%2C+G">Goulven Qu茅m茅ner</a>, <a href="/search/quant-ph?searchtype=author&query=Bohn%2C+J+L">John L. Bohn</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2103.06246v2-abstract-short" style="display: inline;"> Ultracold polar molecules possess long-range, anisotropic, and tunable dipolar interactions, providing the opportunities to probe quantum phenomena inaccessible with existing cold gas platforms. However, experimental progress has been hindered by the dominance of two-body loss over elastic interactions, which prevents efficient evaporative cooling. Though recent work has demonstrated controlled in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.06246v2-abstract-full').style.display = 'inline'; document.getElementById('2103.06246v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2103.06246v2-abstract-full" style="display: none;"> Ultracold polar molecules possess long-range, anisotropic, and tunable dipolar interactions, providing the opportunities to probe quantum phenomena inaccessible with existing cold gas platforms. However, experimental progress has been hindered by the dominance of two-body loss over elastic interactions, which prevents efficient evaporative cooling. Though recent work has demonstrated controlled interactions by confining molecules to a two-dimensional geometry, a general approach for tuning molecular interactions in a three-dimensional (3D), stable system has been lacking. Here, we demonstrate tunable elastic dipolar interactions in a bulk gas of ultracold 40K87Rb molecules in 3D, facilitated by an electric field-induced shielding resonance which suppresses the reactive loss by a factor of thirty. This improvement in the ratio of elastic to inelastic collisions enables direct thermalization. The thermalization rate depends on the angle between the collisional axis and the dipole orientation controlled by an external electric field, a direct manifestation of the anisotropic dipolar interaction. We achieve evaporative cooling mediated by the dipolar interactions in three dimensions. This work demonstrates full control of a long-lived bulk quantum gas system with tunable long-range interactions, paving the way for the study of collective quantum many-body physics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.06246v2-abstract-full').style.display = 'none'; document.getElementById('2103.06246v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Main text 27 pages (4+1 figures) + 8 pages Supplementary Information</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Physics (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2103.02216">arXiv:2103.02216</a> <span> [<a href="https://arxiv.org/pdf/2103.02216">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1126/science.abh3483">10.1126/science.abh3483 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Pauli blocking of atomic spontaneous decay </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Sanner%2C+C">Christian Sanner</a>, <a href="/search/quant-ph?searchtype=author&query=Sonderhouse%2C+L">Lindsay Sonderhouse</a>, <a href="/search/quant-ph?searchtype=author&query=Hutson%2C+R+B">Ross B. Hutson</a>, <a href="/search/quant-ph?searchtype=author&query=Yan%2C+L">Lingfeng Yan</a>, <a href="/search/quant-ph?searchtype=author&query=Milner%2C+W+R">William R. Milner</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2103.02216v1-abstract-short" style="display: inline;"> Spontaneous decay of an excited atomic state is a fundamental process that originates from the interaction between matter and vacuum modes of the electromagnetic field. The rate of decay can thus be engineered by modifying the density of final states of the joint atom-photon system. Imposing suitable boundary conditions on the electromagnetic field has been shown to alter the density of vacuum mod… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.02216v1-abstract-full').style.display = 'inline'; document.getElementById('2103.02216v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2103.02216v1-abstract-full" style="display: none;"> Spontaneous decay of an excited atomic state is a fundamental process that originates from the interaction between matter and vacuum modes of the electromagnetic field. The rate of decay can thus be engineered by modifying the density of final states of the joint atom-photon system. Imposing suitable boundary conditions on the electromagnetic field has been shown to alter the density of vacuum modes near the atomic transition, resulting in modified atomic decay rates. Here we report the first experimental demonstration of suppression of atomic radiative decay by reducing the density of available energy-momentum modes of the atomic motion when it is embedded inside a Fermi sea. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.02216v1-abstract-full').style.display = 'none'; document.getElementById('2103.02216v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2102.05786">arXiv:2102.05786</a> <span> [<a href="https://arxiv.org/pdf/2102.05786">pdf</a>, <a href="https://arxiv.org/format/2102.05786">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.127.013401">10.1103/PhysRevLett.127.013401 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Dipole-dipole frequency shifts in multilevel atoms </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Cidrim%2C+A">A. Cidrim</a>, <a href="/search/quant-ph?searchtype=author&query=Orioli%2C+A+P">A. Pi帽eiro Orioli</a>, <a href="/search/quant-ph?searchtype=author&query=Sanner%2C+C">C. Sanner</a>, <a href="/search/quant-ph?searchtype=author&query=Hutson%2C+R+B">R. B. Hutson</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">J. Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Bachelard%2C+R">R. Bachelard</a>, <a href="/search/quant-ph?searchtype=author&query=Rey%2C+A+M">A. M. Rey</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2102.05786v1-abstract-short" style="display: inline;"> Dipole-dipole interactions lead to frequency shifts that are expected to limit the performance of next-generation atomic clocks. In this work, we compute dipolar frequency shifts accounting for the intrinsic atomic multilevel structure in standard Ramsey spectroscopy. When interrogating the transitions featuring the smallest Clebsch-Gordan coefficients, we find that a simplified two-level treatmen… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.05786v1-abstract-full').style.display = 'inline'; document.getElementById('2102.05786v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2102.05786v1-abstract-full" style="display: none;"> Dipole-dipole interactions lead to frequency shifts that are expected to limit the performance of next-generation atomic clocks. In this work, we compute dipolar frequency shifts accounting for the intrinsic atomic multilevel structure in standard Ramsey spectroscopy. When interrogating the transitions featuring the smallest Clebsch-Gordan coefficients, we find that a simplified two-level treatment becomes inappropriate, even in the presence of large Zeeman shifts. For these cases, we show a net suppression of dipolar frequency shifts and the emergence of dominant non-classical effects for experimentally relevant parameters. Our findings are pertinent to current generations of optical lattice and optical tweezer clocks, opening a way to further increase their current accuracy, and thus their potential to probe fundamental and many-body physics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.05786v1-abstract-full').style.display = 'none'; document.getElementById('2102.05786v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 pages (6 main text, 12 supplemental material), 10 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 127, 013401 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2011.08202">arXiv:2011.08202</a> <span> [<a href="https://arxiv.org/pdf/2011.08202">pdf</a>, <a href="https://arxiv.org/format/2011.08202">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.126.113401">10.1103/PhysRevLett.126.113401 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Dynamical generation of spin squeezing in ultra-cold dipolar molecules </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Bilitewski%2C+T">Thomas Bilitewski</a>, <a href="/search/quant-ph?searchtype=author&query=De+Marco%2C+L">Luigi De Marco</a>, <a href="/search/quant-ph?searchtype=author&query=Li%2C+J">Jun-Ru Li</a>, <a href="/search/quant-ph?searchtype=author&query=Matsuda%2C+K">Kyle Matsuda</a>, <a href="/search/quant-ph?searchtype=author&query=Tobias%2C+W+G">William G. Tobias</a>, <a href="/search/quant-ph?searchtype=author&query=Valtolina%2C+G">Giacomo Valtolina</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Rey%2C+A+M">Ana Maria Rey</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2011.08202v2-abstract-short" style="display: inline;"> We study a bulk fermionic dipolar molecular gas in the quantum degenerate regime confined in a two-dimensional geometry. We consider two rotational states that encode a spin 1/2 degree of freedom. We derive a long-range interacting XXZ model describing the many-body spin dynamics of the molecules valid in the regime where motional degrees of freedom are frozen. Due to the spatially extended nature… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2011.08202v2-abstract-full').style.display = 'inline'; document.getElementById('2011.08202v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2011.08202v2-abstract-full" style="display: none;"> We study a bulk fermionic dipolar molecular gas in the quantum degenerate regime confined in a two-dimensional geometry. We consider two rotational states that encode a spin 1/2 degree of freedom. We derive a long-range interacting XXZ model describing the many-body spin dynamics of the molecules valid in the regime where motional degrees of freedom are frozen. Due to the spatially extended nature of the harmonic oscillator modes, the interactions in the spin model are very long-ranged and the system behaves close to the collective limit, resulting in robust dynamics and generation of entanglement in the form of spin squeezing even at finite temperature and in presence of dephasing and chemical reactions. We demonstrate how the internal state structure can be exploited to realise time-reversal and enhanced metrological sensing protocols. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2011.08202v2-abstract-full').style.display = 'none'; document.getElementById('2011.08202v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 February, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 November, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages, 4 figures + supplementary (12 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 126, 113401 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2009.07461">arXiv:2009.07461</a> <span> [<a href="https://arxiv.org/pdf/2009.07461">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1126/science.abe7370">10.1126/science.abe7370 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Resonant collisional shielding of reactive molecules using electric fields </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Matsuda%2C+K">Kyle Matsuda</a>, <a href="/search/quant-ph?searchtype=author&query=De+Marco%2C+L">Luigi De Marco</a>, <a href="/search/quant-ph?searchtype=author&query=Li%2C+J">Jun-Ru Li</a>, <a href="/search/quant-ph?searchtype=author&query=Tobias%2C+W+G">William G. Tobias</a>, <a href="/search/quant-ph?searchtype=author&query=Valtolina%2C+G">Giacomo Valtolina</a>, <a href="/search/quant-ph?searchtype=author&query=Qu%C3%A9m%C3%A9ner%2C+G">Goulven Qu茅m茅ner</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2009.07461v1-abstract-short" style="display: inline;"> Full control of molecular interactions, including reactive losses, would open new frontiers in quantum science. Here, we demonstrate extreme tunability of chemical reaction rates by using an external electric field to shift excited collision channels of ultracold molecules into degeneracy with the initial collision channel. In this situation, resonant dipolar interactions mix the channels at long… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.07461v1-abstract-full').style.display = 'inline'; document.getElementById('2009.07461v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2009.07461v1-abstract-full" style="display: none;"> Full control of molecular interactions, including reactive losses, would open new frontiers in quantum science. Here, we demonstrate extreme tunability of chemical reaction rates by using an external electric field to shift excited collision channels of ultracold molecules into degeneracy with the initial collision channel. In this situation, resonant dipolar interactions mix the channels at long range, dramatically altering the intermolecular potential. We prepare fermionic potassium-rubidium (KRb) molecules in their first excited rotational state and observe a three orders-of-magnitude modulation of the chemical reaction rate as we tune the electric field strength by a few percent across resonance. In a quasi-two-dimensional geometry, we accurately determine the contributions from the three lowest angular momentum projections of the collisions. Using the resonant features, we shield the molecules from loss and suppress the reaction rate by up to an order of magnitude below the background value, realizing a long-lived sample of polar molecules in large electric fields. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.07461v1-abstract-full').style.display = 'none'; document.getElementById('2009.07461v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">17+4 pages, 4+1 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Science 370, 1324-1327 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2007.12277">arXiv:2007.12277</a> <span> [<a href="https://arxiv.org/pdf/2007.12277">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41586-020-2980-7">10.1038/s41586-020-2980-7 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Dipolar evaporation of reactive molecules to below the Fermi temperature </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Valtolina%2C+G">Giacomo Valtolina</a>, <a href="/search/quant-ph?searchtype=author&query=Matsuda%2C+K">Kyle Matsuda</a>, <a href="/search/quant-ph?searchtype=author&query=Tobias%2C+W+G">William G. Tobias</a>, <a href="/search/quant-ph?searchtype=author&query=Li%2C+J">Jun-Ru Li</a>, <a href="/search/quant-ph?searchtype=author&query=De+Marco%2C+L">Luigi De Marco</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2007.12277v1-abstract-short" style="display: inline;"> Molecules are the building blocks of matter and their control is key to the investigation of new quantum phases, where rich degrees of freedom can be used to encode information and strong interactions can be precisely tuned. Inelastic losses in molecular collisions, however, have greatly hampered the engineering of low-entropy molecular systems. So far, the only quantum degenerate gas of molecules… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.12277v1-abstract-full').style.display = 'inline'; document.getElementById('2007.12277v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2007.12277v1-abstract-full" style="display: none;"> Molecules are the building blocks of matter and their control is key to the investigation of new quantum phases, where rich degrees of freedom can be used to encode information and strong interactions can be precisely tuned. Inelastic losses in molecular collisions, however, have greatly hampered the engineering of low-entropy molecular systems. So far, the only quantum degenerate gas of molecules has been created via association of two highly degenerate atomic gases. Here, we use an external electric field along with optical lattice confinement to create a two-dimensional (2D) Fermi gas of spin-polarized potassium-rubidium (KRb) polar molecules, where elastic, tunable dipolar interactions dominate over all inelastic processes. Direct thermalization among the molecules in the trap leads to efficient dipolar evaporative cooling, yielding a rapid increase in phase-space density. At the onset of quantum degeneracy, we observe the effects of Fermi statistics on the thermodynamics of the molecular gas. These results demonstrate a general strategy for achieving quantum degeneracy in dipolar molecular gases to explore strongly interacting many-body phases. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.12277v1-abstract-full').style.display = 'none'; document.getElementById('2007.12277v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8+4 pages, 4+4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2007.09842">arXiv:2007.09842</a> <span> [<a href="https://arxiv.org/pdf/2007.09842">pdf</a>, <a href="https://arxiv.org/format/2007.09842">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevA.102.042209">10.1103/PhysRevA.102.042209 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Emergent topology under slow non-adiabatic quantum dynamics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Junchen Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Li%2C+F">Fuxiang Li</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2007.09842v1-abstract-short" style="display: inline;"> Characterization of equilibrium topological quantum phases by non-equilibrium quench dynamics provides a novel and efficient scheme in detecting topological invariants defined in equilibrium. Nevertheless, most of the previous studies have focused on the ideal sudden quench regime. Here we provide a generic non-adiabatic protocol of slowly quenching the system Hamiltonian, and investigate the non-… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.09842v1-abstract-full').style.display = 'inline'; document.getElementById('2007.09842v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2007.09842v1-abstract-full" style="display: none;"> Characterization of equilibrium topological quantum phases by non-equilibrium quench dynamics provides a novel and efficient scheme in detecting topological invariants defined in equilibrium. Nevertheless, most of the previous studies have focused on the ideal sudden quench regime. Here we provide a generic non-adiabatic protocol of slowly quenching the system Hamiltonian, and investigate the non-adiabatic dynamical characterization scheme of topological phase. The {\it slow} quench protocol is realized by introducing a Coulomb-like Landau-Zener problem, and it can describe, in a unified way, the crossover from sudden quench regime (deep non-adiabatic limit) to adiabatic regime. By analytically obtaining the final state vector after non-adiabatic evolution, we can calculate the time-averaged spin polarization and the corresponding topological spin texture. We find that the topological invariants of the post-quench Hamiltonian are characterized directly by the values of spin texture on the band inversion surfaces. Compared to the sudden quench regime, where one has to take an additional step to calculate the {\it gradients} of spin polarization, this non-adiabatic characterization provides a {\it minimal} scheme in detecting the topological invariants. Our findings are not restricted to 1D and 2D topological phases under Coulomb-like quench protocol, but are also valid for higher dimensional system or different quench protocol. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.09842v1-abstract-full').style.display = 'none'; document.getElementById('2007.09842v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">11 pages, 8 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. A 102, 042209 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2004.06095">arXiv:2004.06095</a> <span> [<a href="https://arxiv.org/pdf/2004.06095">pdf</a>, <a href="https://arxiv.org/format/2004.06095">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41586-020-3009-y">10.1038/s41586-020-3009-y <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A tweezer clock with half-minute atomic coherence at optical frequencies and high relative stability </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Young%2C+A+W">Aaron W. Young</a>, <a href="/search/quant-ph?searchtype=author&query=Eckner%2C+W+J">William J. Eckner</a>, <a href="/search/quant-ph?searchtype=author&query=Milner%2C+W+R">William R. Milner</a>, <a href="/search/quant-ph?searchtype=author&query=Kedar%2C+D">Dhruv Kedar</a>, <a href="/search/quant-ph?searchtype=author&query=Norcia%2C+M+A">Matthew A. Norcia</a>, <a href="/search/quant-ph?searchtype=author&query=Oelker%2C+E">Eric Oelker</a>, <a href="/search/quant-ph?searchtype=author&query=Schine%2C+N">Nathan Schine</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Kaufman%2C+A+M">Adam M. Kaufman</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2004.06095v2-abstract-short" style="display: inline;"> The preparation of large, low-entropy, highly coherent ensembles of identical quantum systems is foundational for many studies in quantum metrology, simulation, and information. Here, we realize these features by leveraging the favorable properties of tweezer-trapped alkaline-earth atoms while introducing a new, hybrid approach to tailoring optical potentials that balances scalability, high-fideli… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.06095v2-abstract-full').style.display = 'inline'; document.getElementById('2004.06095v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2004.06095v2-abstract-full" style="display: none;"> The preparation of large, low-entropy, highly coherent ensembles of identical quantum systems is foundational for many studies in quantum metrology, simulation, and information. Here, we realize these features by leveraging the favorable properties of tweezer-trapped alkaline-earth atoms while introducing a new, hybrid approach to tailoring optical potentials that balances scalability, high-fidelity state preparation, site-resolved readout, and preservation of atomic coherence. With this approach, we achieve trapping and optical clock excited-state lifetimes exceeding $ 40 $ seconds in ensembles of approximately $ 150 $ atoms. This leads to half-minute-scale atomic coherence on an optical clock transition, corresponding to quality factors well in excess of $10^{16}$. These coherence times and atom numbers reduce the effect of quantum projection noise to a level that is on par with leading atomic systems, yielding a relative fractional frequency stability of $5.2(3)\times10^{-17}~(蟿/s)^{-1/2}$ for synchronous clock comparisons between sub-ensembles within the tweezer array. When further combined with the microscopic control and readout available in this system, these results pave the way towards long-lived engineered entanglement on an optical clock transition in tailored atom arrays. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.06095v2-abstract-full').style.display = 'none'; document.getElementById('2004.06095v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">11 pages, 5 figures (main text); 17 pages, 7 figures (supplemental materials)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature 588, 408-413 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2004.01856">arXiv:2004.01856</a> <span> [<a href="https://arxiv.org/pdf/2004.01856">pdf</a>, <a href="https://arxiv.org/format/2004.01856">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevResearch.2.033095">10.1103/PhysRevResearch.2.033095 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Beyond the Limits of Conventional Stark Deceleration </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Reens%2C+D">David Reens</a>, <a href="/search/quant-ph?searchtype=author&query=Wu%2C+H">Hao Wu</a>, <a href="/search/quant-ph?searchtype=author&query=Aeppli%2C+A">Alexander Aeppli</a>, <a href="/search/quant-ph?searchtype=author&query=McAuliffe%2C+A">Anna McAuliffe</a>, <a href="/search/quant-ph?searchtype=author&query=Wcis%C5%82o%2C+P">Piotr Wcis艂o</a>, <a href="/search/quant-ph?searchtype=author&query=Langen%2C+T">Tim Langen</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2004.01856v1-abstract-short" style="display: inline;"> Stark deceleration enables the production of cold and dense molecular beams with applications in trapping, collisional studies, and precision measurement. Improving the efficiency of Stark deceleration, and hence the achievable molecular densities, is central to unlock the full potential of such studies. One of the chief limitations arises from the transverse focusing properties of Stark decelerat… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.01856v1-abstract-full').style.display = 'inline'; document.getElementById('2004.01856v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2004.01856v1-abstract-full" style="display: none;"> Stark deceleration enables the production of cold and dense molecular beams with applications in trapping, collisional studies, and precision measurement. Improving the efficiency of Stark deceleration, and hence the achievable molecular densities, is central to unlock the full potential of such studies. One of the chief limitations arises from the transverse focusing properties of Stark decelerators. We introduce a new operation strategy that circumvents this limit without any hardware modifications, and experimentally verify our results for hydroxyl radicals. Notably, improved focusing results in significant gains in molecule yield with increased operating voltage, formerly limited by transverse-longitudinal coupling. At final velocities sufficiently small for trapping, molecule flux improves by a factor of four, and potentially more with increased voltage. The improvement is more significant for less readily polarized species, thereby expanding the class of candidate molecules for Stark deceleration. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.01856v1-abstract-full').style.display = 'none'; document.getElementById('2004.01856v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Research 2, 033095 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2001.11792">arXiv:2001.11792</a> <span> [<a href="https://arxiv.org/pdf/2001.11792">pdf</a>, <a href="https://arxiv.org/format/2001.11792">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevA.102.023320">10.1103/PhysRevA.102.023320 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Quantum Many-Body Physics with Ultracold Polar Molecules: Nanostructured Potential Barriers and Interactions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Kruckenhauser%2C+A">Andreas Kruckenhauser</a>, <a href="/search/quant-ph?searchtype=author&query=Sieberer%2C+L+M">Lukas M. Sieberer</a>, <a href="/search/quant-ph?searchtype=author&query=Tobias%2C+W+G">William G. Tobias</a>, <a href="/search/quant-ph?searchtype=author&query=Matsuda%2C+K">Kyle Matsuda</a>, <a href="/search/quant-ph?searchtype=author&query=De+Marco%2C+L">Luigi De Marco</a>, <a href="/search/quant-ph?searchtype=author&query=Li%2C+J">Jun-Ru Li</a>, <a href="/search/quant-ph?searchtype=author&query=Valtolina%2C+G">Giacomo Valtolina</a>, <a href="/search/quant-ph?searchtype=author&query=Rey%2C+A+M">Ana Maria Rey</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Baranov%2C+M+A">Mikhail A. Baranov</a>, <a href="/search/quant-ph?searchtype=author&query=Zoller%2C+P">Peter Zoller</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2001.11792v2-abstract-short" style="display: inline;"> We design dipolar quantum many-body Hamiltonians that will facilitate the realization of exotic quantum phases under current experimental conditions achieved for polar molecules. The main idea is to modulate both single-body potential barriers and two-body dipolar interactions on a spatial scale of tens of nanometers to strongly enhance energy scales and, therefore, relax temperature requirements… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2001.11792v2-abstract-full').style.display = 'inline'; document.getElementById('2001.11792v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2001.11792v2-abstract-full" style="display: none;"> We design dipolar quantum many-body Hamiltonians that will facilitate the realization of exotic quantum phases under current experimental conditions achieved for polar molecules. The main idea is to modulate both single-body potential barriers and two-body dipolar interactions on a spatial scale of tens of nanometers to strongly enhance energy scales and, therefore, relax temperature requirements for observing new quantum phases of engineered many-body systems. We consider and compare two approaches. In the first, nanoscale barriers are generated with standing wave optical light fields exploiting optical nonlinearities. In the second, static electric field gradients in combination with microwave dressing are used to write nanostructured spatial patterns on the induced electric dipole moments, and thus dipolar interactions. We study the formation of inter-layer and interface bound states of molecules in these configurations, and provide detailed estimates for binding energies and expected losses for present experimental setups. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2001.11792v2-abstract-full').style.display = 'none'; document.getElementById('2001.11792v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 January, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">21 pages, 7 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. A 102, 023320 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1912.06938">arXiv:1912.06938</a> <span> [<a href="https://arxiv.org/pdf/1912.06938">pdf</a>, <a href="https://arxiv.org/ps/1912.06938">ps</a>, <a href="https://arxiv.org/format/1912.06938">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PRXQuantum.2.017003">10.1103/PRXQuantum.2.017003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Quantum Simulators: Architectures and Opportunities </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Altman%2C+E">Ehud Altman</a>, <a href="/search/quant-ph?searchtype=author&query=Brown%2C+K+R">Kenneth R. Brown</a>, <a href="/search/quant-ph?searchtype=author&query=Carleo%2C+G">Giuseppe Carleo</a>, <a href="/search/quant-ph?searchtype=author&query=Carr%2C+L+D">Lincoln D. Carr</a>, <a href="/search/quant-ph?searchtype=author&query=Demler%2C+E">Eugene Demler</a>, <a href="/search/quant-ph?searchtype=author&query=Chin%2C+C">Cheng Chin</a>, <a href="/search/quant-ph?searchtype=author&query=DeMarco%2C+B">Brian DeMarco</a>, <a href="/search/quant-ph?searchtype=author&query=Economou%2C+S+E">Sophia E. Economou</a>, <a href="/search/quant-ph?searchtype=author&query=Eriksson%2C+M+A">Mark A. Eriksson</a>, <a href="/search/quant-ph?searchtype=author&query=Fu%2C+K+C">Kai-Mei C. Fu</a>, <a href="/search/quant-ph?searchtype=author&query=Greiner%2C+M">Markus Greiner</a>, <a href="/search/quant-ph?searchtype=author&query=Hazzard%2C+K+R+A">Kaden R. A. Hazzard</a>, <a href="/search/quant-ph?searchtype=author&query=Hulet%2C+R+G">Randall G. Hulet</a>, <a href="/search/quant-ph?searchtype=author&query=Kollar%2C+A+J">Alicia J. Kollar</a>, <a href="/search/quant-ph?searchtype=author&query=Lev%2C+B+L">Benjamin L. Lev</a>, <a href="/search/quant-ph?searchtype=author&query=Lukin%2C+M+D">Mikhail D. Lukin</a>, <a href="/search/quant-ph?searchtype=author&query=Ma%2C+R">Ruichao Ma</a>, <a href="/search/quant-ph?searchtype=author&query=Mi%2C+X">Xiao Mi</a>, <a href="/search/quant-ph?searchtype=author&query=Misra%2C+S">Shashank Misra</a>, <a href="/search/quant-ph?searchtype=author&query=Monroe%2C+C">Christopher Monroe</a>, <a href="/search/quant-ph?searchtype=author&query=Murch%2C+K">Kater Murch</a>, <a href="/search/quant-ph?searchtype=author&query=Nazario%2C+Z">Zaira Nazario</a>, <a href="/search/quant-ph?searchtype=author&query=Ni%2C+K">Kang-Kuen Ni</a>, <a href="/search/quant-ph?searchtype=author&query=Potter%2C+A+C">Andrew C. Potter</a>, <a href="/search/quant-ph?searchtype=author&query=Roushan%2C+P">Pedram Roushan</a> , et al. (12 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1912.06938v2-abstract-short" style="display: inline;"> Quantum simulators are a promising technology on the spectrum of quantum devices from specialized quantum experiments to universal quantum computers. These quantum devices utilize entanglement and many-particle behaviors to explore and solve hard scientific, engineering, and computational problems. Rapid development over the last two decades has produced more than 300 quantum simulators in operati… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.06938v2-abstract-full').style.display = 'inline'; document.getElementById('1912.06938v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1912.06938v2-abstract-full" style="display: none;"> Quantum simulators are a promising technology on the spectrum of quantum devices from specialized quantum experiments to universal quantum computers. These quantum devices utilize entanglement and many-particle behaviors to explore and solve hard scientific, engineering, and computational problems. Rapid development over the last two decades has produced more than 300 quantum simulators in operation worldwide using a wide variety of experimental platforms. Recent advances in several physical architectures promise a golden age of quantum simulators ranging from highly optimized special purpose simulators to flexible programmable devices. These developments have enabled a convergence of ideas drawn from fundamental physics, computer science, and device engineering. They have strong potential to address problems of societal importance, ranging from understanding vital chemical processes, to enabling the design of new materials with enhanced performance, to solving complex computational problems. It is the position of the community, as represented by participants of the NSF workshop on "Programmable Quantum Simulators," that investment in a national quantum simulator program is a high priority in order to accelerate the progress in this field and to result in the first practical applications of quantum machines. Such a program should address two areas of emphasis: (1) support for creating quantum simulator prototypes usable by the broader scientific community, complementary to the present universal quantum computer effort in industry; and (2) support for fundamental research carried out by a blend of multi-investigator, multi-disciplinary collaborations with resources for quantum simulator software, hardware, and education. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.06938v2-abstract-full').style.display = 'none'; document.getElementById('1912.06938v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">41 pages -- references and acknowledgments added in v2</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> PRX Quantum 2, 017003 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1908.08343">arXiv:1908.08343</a> <span> [<a href="https://arxiv.org/pdf/1908.08343">pdf</a>, <a href="https://arxiv.org/format/1908.08343">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.123.260505">10.1103/PhysRevLett.123.260505 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Variational spin-squeezing algorithms on programmable quantum sensors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Kaubruegger%2C+R">Raphael Kaubruegger</a>, <a href="/search/quant-ph?searchtype=author&query=Silvi%2C+P">Pietro Silvi</a>, <a href="/search/quant-ph?searchtype=author&query=Kokail%2C+C">Christian Kokail</a>, <a href="/search/quant-ph?searchtype=author&query=van+Bijnen%2C+R">Rick van Bijnen</a>, <a href="/search/quant-ph?searchtype=author&query=Rey%2C+A+M">Ana Maria Rey</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Kaufman%2C+A+M">Adam M. Kaufman</a>, <a href="/search/quant-ph?searchtype=author&query=Zoller%2C+P">Peter Zoller</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1908.08343v1-abstract-short" style="display: inline;"> Arrays of atoms trapped in optical tweezers combine features of programmable analog quantum simulators with atomic quantum sensors. Here we propose variational quantum algorithms, tailored for tweezer arrays as programmable quantum sensors, capable of generating entangled states on-demand for precision metrology. The scheme is designed to generate metrological enhancement by optimizing it in a fee… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.08343v1-abstract-full').style.display = 'inline'; document.getElementById('1908.08343v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1908.08343v1-abstract-full" style="display: none;"> Arrays of atoms trapped in optical tweezers combine features of programmable analog quantum simulators with atomic quantum sensors. Here we propose variational quantum algorithms, tailored for tweezer arrays as programmable quantum sensors, capable of generating entangled states on-demand for precision metrology. The scheme is designed to generate metrological enhancement by optimizing it in a feedback loop on the quantum device itself, thus preparing the best entangled states given the available quantum resources. We apply our ideas to generate spin-squeezed states on Sr atom tweezer arrays, where finite-range interactions are generated through Rydberg dressing. The complexity of experimental variational optimization of our quantum circuits is expected to scale favorably with system size. We numerically show our approach to be robust to noise, and surpassing known protocols. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.08343v1-abstract-full').style.display = 'none'; document.getElementById('1908.08343v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 10 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 123, 260505 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1907.03867">arXiv:1907.03867</a> <span> [<a href="https://arxiv.org/pdf/1907.03867">pdf</a>, <a href="https://arxiv.org/format/1907.03867">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="General Relativity and Quantum Cosmology">gr-qc</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epjd/e2019-100324-6">10.1140/epjd/e2019-100324-6 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> SAGE: A Proposal for a Space Atomic Gravity Explorer </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Tino%2C+G+M">G. M. Tino</a>, <a href="/search/quant-ph?searchtype=author&query=Bassi%2C+A">A. Bassi</a>, <a href="/search/quant-ph?searchtype=author&query=Bianco%2C+G">G. Bianco</a>, <a href="/search/quant-ph?searchtype=author&query=Bongs%2C+K">K. Bongs</a>, <a href="/search/quant-ph?searchtype=author&query=Bouyer%2C+P">P. Bouyer</a>, <a href="/search/quant-ph?searchtype=author&query=Cacciapuoti%2C+L">L. Cacciapuoti</a>, <a href="/search/quant-ph?searchtype=author&query=Capozziello%2C+S">S. Capozziello</a>, <a href="/search/quant-ph?searchtype=author&query=Chen%2C+X">X. Chen</a>, <a href="/search/quant-ph?searchtype=author&query=Chiofalo%2C+M+L">M. L. Chiofalo</a>, <a href="/search/quant-ph?searchtype=author&query=Derevianko%2C+A">A. Derevianko</a>, <a href="/search/quant-ph?searchtype=author&query=Ertmer%2C+W">W. Ertmer</a>, <a href="/search/quant-ph?searchtype=author&query=Gaaloul%2C+N">N. Gaaloul</a>, <a href="/search/quant-ph?searchtype=author&query=Gill%2C+P">P. Gill</a>, <a href="/search/quant-ph?searchtype=author&query=Graham%2C+P+W">P. W. Graham</a>, <a href="/search/quant-ph?searchtype=author&query=Hogan%2C+J+M">J. M. Hogan</a>, <a href="/search/quant-ph?searchtype=author&query=Iess%2C+L">L. Iess</a>, <a href="/search/quant-ph?searchtype=author&query=Kasevich%2C+M+A">M. A. Kasevich</a>, <a href="/search/quant-ph?searchtype=author&query=Katori%2C+H">H. Katori</a>, <a href="/search/quant-ph?searchtype=author&query=Klempt%2C+C">C. Klempt</a>, <a href="/search/quant-ph?searchtype=author&query=Lu%2C+X">X. Lu</a>, <a href="/search/quant-ph?searchtype=author&query=Ma%2C+L+-">L. -S. Ma</a>, <a href="/search/quant-ph?searchtype=author&query=M%C3%BCller%2C+H">H. M眉ller</a>, <a href="/search/quant-ph?searchtype=author&query=Newbury%2C+N+R">N. R. Newbury</a>, <a href="/search/quant-ph?searchtype=author&query=Oates%2C+C">C. Oates</a>, <a href="/search/quant-ph?searchtype=author&query=Peters%2C+A">A. Peters</a> , et al. (22 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1907.03867v2-abstract-short" style="display: inline;"> The proposed mission "Space Atomic Gravity Explorer" (SAGE) has the scientific objective to investigate gravitational waves, dark matter, and other fundamental aspects of gravity as well as the connection between gravitational physics and quantum physics using new quantum sensors, namely, optical atomic clocks and atom interferometers based on ultracold strontium atoms. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1907.03867v2-abstract-full" style="display: none;"> The proposed mission "Space Atomic Gravity Explorer" (SAGE) has the scientific objective to investigate gravitational waves, dark matter, and other fundamental aspects of gravity as well as the connection between gravitational physics and quantum physics using new quantum sensors, namely, optical atomic clocks and atom interferometers based on ultracold strontium atoms. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.03867v2-abstract-full').style.display = 'none'; document.getElementById('1907.03867v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 November, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 July, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Published in Eur. Phys. J. D 73 (2019) 228 in the Topical Issue Quantum Technologies for Gravitational Physics, Guest editors Tanja Mehlstaubler, Yanbei Chen, Guglielmo M. Tino and Hsien-Chi Yeh</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. D 73, 228 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1906.06004">arXiv:1906.06004</a> <span> [<a href="https://arxiv.org/pdf/1906.06004">pdf</a>, <a href="https://arxiv.org/format/1906.06004">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1681-7575/ab4089">10.1088/1681-7575/ab4089 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> JILA SrI Optical Lattice Clock with Uncertainty of $2.0 \times 10^{-18}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Bothwell%2C+T">Tobias Bothwell</a>, <a href="/search/quant-ph?searchtype=author&query=Kedar%2C+D">Dhruv Kedar</a>, <a href="/search/quant-ph?searchtype=author&query=Oelker%2C+E">Eric Oelker</a>, <a href="/search/quant-ph?searchtype=author&query=Robinson%2C+J+M">John M. Robinson</a>, <a href="/search/quant-ph?searchtype=author&query=Bromley%2C+S+L">Sarah L. Bromley</a>, <a href="/search/quant-ph?searchtype=author&query=Tew%2C+W+L">Weston L. Tew</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Kennedy%2C+C+J">Colin J. Kennedy</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1906.06004v1-abstract-short" style="display: inline;"> We report on an improved systematic evaluation of the JILA SrI optical lattice clock, achieving a nearly identical systematic uncertainty compared to the previous strontium accuracy record set by the JILA SrII optical lattice clock (OLC) at $2.1 \times 10^{-18}$. This improves upon the previous evaluation of the JILA SrI optical lattice clock in 2013, and we achieve a more than twenty-fold reducti… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.06004v1-abstract-full').style.display = 'inline'; document.getElementById('1906.06004v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1906.06004v1-abstract-full" style="display: none;"> We report on an improved systematic evaluation of the JILA SrI optical lattice clock, achieving a nearly identical systematic uncertainty compared to the previous strontium accuracy record set by the JILA SrII optical lattice clock (OLC) at $2.1 \times 10^{-18}$. This improves upon the previous evaluation of the JILA SrI optical lattice clock in 2013, and we achieve a more than twenty-fold reduction in systematic uncertainty to $2.0 \times 10^{-18}$. A seven-fold improvement in clock stability, reaching $4.8 \times 10^{-17}/\sqrt蟿$ for an averaging time $蟿$ in seconds, allows the clock to average to its systematic uncertainty in under 10 minutes. We improve the systematic uncertainty budget in several important ways. This includes a novel scheme for taming blackbody radiation-induced frequency shifts through active stabilization and characterization of the thermal environment, inclusion of higher-order terms in the lattice light shift, and updated atomic coefficients. Along with careful control of other systematic effects, we achieve low temporal drift of systematic offsets and high uptime of the clock. We additionally present an improved evaluation of the second order Zeeman coefficient that is applicable to all Sr optical lattice clocks. These improvements in performance have enabled several important studies including frequency ratio measurements through the Boulder Area Clock Optical Network (BACON), a high precision comparison with the JILA 3D lattice clock, a demonstration of a new all-optical time scale combining SrI and a cryogenic silicon cavity, and a high sensitivity search for ultralight scalar dark matter. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.06004v1-abstract-full').style.display = 'none'; document.getElementById('1906.06004v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">24 pages, 9 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.09518">arXiv:1905.09518</a> <span> [<a href="https://arxiv.org/pdf/1905.09518">pdf</a>, <a href="https://arxiv.org/format/1905.09518">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1361-6455/ab58f6">10.1088/1361-6455/ab58f6 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Distributed quantum information processing via single atom driving </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Liu%2C+J">Jing-Xin Liu</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun-Yao Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Yan%2C+L">Lei-Lei Yan</a>, <a href="/search/quant-ph?searchtype=author&query=Su%2C+S">Shi-Lei Su</a>, <a href="/search/quant-ph?searchtype=author&query=Feng%2C+M">Mang Feng</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1905.09518v1-abstract-short" style="display: inline;"> We propose an unconventional scheme for quantum entangled state distribution (QESD) and quantum state transfer~(QST) based on a fiber-cavity-atom system, in which three atoms are confined, respectively, in three bimodal cavities connected with each other by optical fibers. The key feature of the scheme is the virtual excitation of photons, which yields QESD and QST between the two atoms in the edg… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.09518v1-abstract-full').style.display = 'inline'; document.getElementById('1905.09518v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.09518v1-abstract-full" style="display: none;"> We propose an unconventional scheme for quantum entangled state distribution (QESD) and quantum state transfer~(QST) based on a fiber-cavity-atom system, in which three atoms are confined, respectively, in three bimodal cavities connected with each other by optical fibers. The key feature of the scheme is the virtual excitation of photons, which yields QESD and QST between the two atoms in the edge-cavities conditioned on one-step operation only on the atom in the middle cavity. No actual operation is performed on the two atoms in the edge cavities throughout the scheme. Robustness of the scheme over operational imperfection and dissipation is discussed and the results show that system fidelity is always at a high level. Finally, the experimental feasibility is justified using laboratory available values. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.09518v1-abstract-full').style.display = 'none'; document.getElementById('1905.09518v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">16pages, 8 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.07694">arXiv:1905.07694</a> <span> [<a href="https://arxiv.org/pdf/1905.07694">pdf</a>, <a href="https://arxiv.org/ps/1905.07694">ps</a>, <a href="https://arxiv.org/format/1905.07694">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Theory">hep-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.124.244101">10.1103/PhysRevLett.124.244101 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Periodic Table of SYK and supersymmetric SYK </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Sun%2C+F">Fadi Sun</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jinwu Ye</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1905.07694v1-abstract-short" style="display: inline;"> We develop a systematic and unified random matrix theory to classify Sachdev-Ye-Kitaev (SYK) and supersymmetric (SUSY) SYK models and also work out the structure of the energy levels in one periodic table. The SYK with even $q$- and SUSY SYK with odd $q$-body interaction, $N$ even or odd number of Majorana fermions are put on the same footing in the minimal Hilbert space, $N\pmod 8$ and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.07694v1-abstract-full').style.display = 'inline'; document.getElementById('1905.07694v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.07694v1-abstract-full" style="display: none;"> We develop a systematic and unified random matrix theory to classify Sachdev-Ye-Kitaev (SYK) and supersymmetric (SUSY) SYK models and also work out the structure of the energy levels in one periodic table. The SYK with even $q$- and SUSY SYK with odd $q$-body interaction, $N$ even or odd number of Majorana fermions are put on the same footing in the minimal Hilbert space, $N\pmod 8$ and $q\pmod 4$ double Bott periodicity are identified. Exact diagonalizations are performed to study both the bulk energy level statistics and hard edge behaviours. A new moment ratio of the smallest positive eigenvalue is introduced to determine hard edge index efficiently. Excellent agreements between the ED results and the symmetry classifications are demonstrated. Our complete and systematic methods can be transformed to map out more complicated periodic tables of SYK models with more degree of freedoms, tensor models and symmetry protected topological phases. Possible classification of charge neutral quantum black holes are hinted. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.07694v1-abstract-full').style.display = 'none'; document.getElementById('1905.07694v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">One Table, 3 Figures, 22 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 124, 244101 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1904.10934">arXiv:1904.10934</a> <span> [<a href="https://arxiv.org/pdf/1904.10934">pdf</a>, <a href="https://arxiv.org/format/1904.10934">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1126/science.aay0644">10.1126/science.aay0644 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Seconds-scale coherence in a tweezer-array optical clock </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/quant-ph?searchtype=author&query=Norcia%2C+M+A">Matthew A. Norcia</a>, <a href="/search/quant-ph?searchtype=author&query=Young%2C+A+W">Aaron W. Young</a>, <a href="/search/quant-ph?searchtype=author&query=Eckner%2C+W+J">William J. Eckner</a>, <a href="/search/quant-ph?searchtype=author&query=Oelker%2C+E">Eric Oelker</a>, <a href="/search/quant-ph?searchtype=author&query=Ye%2C+J">Jun Ye</a>, <a href="/search/quant-ph?searchtype=author&query=Kaufman%2C+A+M">Adam M. Kaufman</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1904.10934v3-abstract-short" style="display: inline;"> Optical clocks based on atoms and ions achieve exceptional precision and accuracy, with applications to relativistic geodesy, tests of relativity, and searches for dark matter. Achieving such performance requires balancing competing desirable features, including a high particle number, isolation of atoms from collisions, insensitivity to motional effects, and high duty-cycle operation. Here we dem… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.10934v3-abstract-full').style.display = 'inline'; document.getElementById('1904.10934v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1904.10934v3-abstract-full" style="display: none;"> Optical clocks based on atoms and ions achieve exceptional precision and accuracy, with applications to relativistic geodesy, tests of relativity, and searches for dark matter. Achieving such performance requires balancing competing desirable features, including a high particle number, isolation of atoms from collisions, insensitivity to motional effects, and high duty-cycle operation. Here we demonstrate a new platform based on arrays of ultracold strontium atoms confined within optical tweezers that realizes a novel combination of these features by providing a scalable platform for isolated atoms that can be interrogated multiple times. With this tweezer-array clock, we achieve greater than 3 second coherence times and record duty cycles up to 96%, as well as stability commensurate with leading platforms. By using optical tweezer arrays --- a proven platform for the controlled creation of entanglement through microscopic control --- this work further promises a new path toward combining entanglement enhanced sensitivities with the most precise optical clock transitions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.10934v3-abstract-full').style.display = 'none'; document.getElementById('1904.10934v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 July, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Science 12 Sep 2019 </p> </li> </ol> <nav class="pagination is-small 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