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<button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <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/1809.05209">arXiv:1809.05209</a> <span> [<a href="https://arxiv.org/pdf/1809.05209">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</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/10.1021/acs.nanolett.8b01972">10.1021/acs.nanolett.8b01972 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Visualization and Control of Single Electron Charging in Bilayer Graphene Quantum Dots </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Velasco%2C+J">Jairo Velasco Jr.</a>, <a href="/search/cond-mat?searchtype=author&query=Lee%2C+J">Juwon Lee</a>, <a href="/search/cond-mat?searchtype=author&query=Wong%2C+D">Dillon Wong</a>, <a href="/search/cond-mat?searchtype=author&query=Kahn%2C+S">Salman Kahn</a>, <a href="/search/cond-mat?searchtype=author&query=Tsai%2C+H">Hsin-Zon Tsai</a>, <a href="/search/cond-mat?searchtype=author&query=Costello%2C+J">Joseph Costello</a>, <a href="/search/cond-mat?searchtype=author&query=Umeda%2C+T">Torben Umeda</a>, <a href="/search/cond-mat?searchtype=author&query=Taniguchi%2C+T">Takashi Taniguchi</a>, <a href="/search/cond-mat?searchtype=author&query=Watanabe%2C+K">Kenji Watanabe</a>, <a href="/search/cond-mat?searchtype=author&query=Zettl%2C+A">Alex Zettl</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+F">Feng Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Crommie%2C+M+F">Michael F. Crommie</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="1809.05209v1-abstract-short" style="display: inline;"> Graphene p-n junctions provide an ideal platform for investigating novel behavior at the boundary between electronics and optics that arise from massless Dirac fermions, such as whispering gallery modes and Veselago lensing. Bilayer graphene also hosts Dirac fermions, but they differ from single-layer graphene charge carriers because they are massive, can be gapped by an applied perpendicular elec… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.05209v1-abstract-full').style.display = 'inline'; document.getElementById('1809.05209v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1809.05209v1-abstract-full" style="display: none;"> Graphene p-n junctions provide an ideal platform for investigating novel behavior at the boundary between electronics and optics that arise from massless Dirac fermions, such as whispering gallery modes and Veselago lensing. Bilayer graphene also hosts Dirac fermions, but they differ from single-layer graphene charge carriers because they are massive, can be gapped by an applied perpendicular electric field, and have very different pseudospin selection rules across a p-n junction. Novel phenomena predicted for these massive Dirac fermions at p-n junctions include anti-Klein tunneling, oscillatory Zener tunneling, and electron cloaked states. Despite these predictions there has been little experimental focus on the microscopic spatial behavior of massive Dirac fermions in the presence of p-n junctions. Here we report the experimental manipulation and characterization of massive Dirac fermions within bilayer graphene quantum dots defined by circular p-n junctions through the use of scanning tunneling microscopy-based (STM) methods. Our p-n junctions are created via a flexible technique that enables realization of exposed quantum dots in bilayer graphene/hBN heterostructures. These quantum dots exhibit sharp spectroscopic resonances that disperse in energy as a function of applied gate voltage. Spatial maps of these features show prominent concentric rings with diameters that can be tuned by an electrostatic gate. This behavior is explained by single-electron charging of localized states that arise from the quantum confinement of massive Dirac fermions within our exposed bilayer graphene quantum dots. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.05209v1-abstract-full').style.display = 'none'; document.getElementById('1809.05209v1-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 September, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nano Lett., 2018, 18 (8), 5104 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1510.06565">arXiv:1510.06565</a> <span> [<a href="https://arxiv.org/pdf/1510.06565">pdf</a>, <a href="https://arxiv.org/format/1510.06565">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="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</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.crhy.2016.07.006">10.1016/j.crhy.2016.07.006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Towards a spin-ensemble quantum memory for superconducting qubits </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Grezes%2C+C">C. Grezes</a>, <a href="/search/cond-mat?searchtype=author&query=Kubo%2C+Y">Y. Kubo</a>, <a href="/search/cond-mat?searchtype=author&query=Julsgaard%2C+B">B. Julsgaard</a>, <a href="/search/cond-mat?searchtype=author&query=Umeda%2C+T">T. Umeda</a>, <a href="/search/cond-mat?searchtype=author&query=Isoya%2C+J">J. Isoya</a>, <a href="/search/cond-mat?searchtype=author&query=Sumiya%2C+H">H. Sumiya</a>, <a href="/search/cond-mat?searchtype=author&query=Abe%2C+H">H. Abe</a>, <a href="/search/cond-mat?searchtype=author&query=Onoda%2C+S">S. Onoda</a>, <a href="/search/cond-mat?searchtype=author&query=Ohshima%2C+T">T. Ohshima</a>, <a href="/search/cond-mat?searchtype=author&query=Nakamura%2C+K">K. Nakamura</a>, <a href="/search/cond-mat?searchtype=author&query=Diniz%2C+I">I. Diniz</a>, <a href="/search/cond-mat?searchtype=author&query=Auffeves%2C+A">A. Auffeves</a>, <a href="/search/cond-mat?searchtype=author&query=Jacques%2C+V">V. Jacques</a>, <a href="/search/cond-mat?searchtype=author&query=Roch%2C+J+-">J. -F. Roch</a>, <a href="/search/cond-mat?searchtype=author&query=Vion%2C+D">D. Vion</a>, <a href="/search/cond-mat?searchtype=author&query=Esteve%2C+D">D. Esteve</a>, <a href="/search/cond-mat?searchtype=author&query=Moelmer%2C+K">K. Moelmer</a>, <a href="/search/cond-mat?searchtype=author&query=Bertet%2C+P">P. Bertet</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="1510.06565v1-abstract-short" style="display: inline;"> This article reviews efforts to build a new type of quantum device, which combines an ensemble of electronic spins with long coherence times, and a small-scale superconducting quantum processor. The goal is to store over long times arbitrary qubit states in orthogonal collective modes of the spin-ensemble, and to retrieve them on-demand. We first present the protocol devised for such a multi-mode… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1510.06565v1-abstract-full').style.display = 'inline'; document.getElementById('1510.06565v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1510.06565v1-abstract-full" style="display: none;"> This article reviews efforts to build a new type of quantum device, which combines an ensemble of electronic spins with long coherence times, and a small-scale superconducting quantum processor. The goal is to store over long times arbitrary qubit states in orthogonal collective modes of the spin-ensemble, and to retrieve them on-demand. We first present the protocol devised for such a multi-mode quantum memory. We then describe a series of experimental results using NV center spins in diamond, which demonstrate its main building blocks: the transfer of arbitrary quantum states from a qubit into the spin ensemble, and the multi-mode retrieval of classical microwave pulses down to the single-photon level with a Hahn-echo like sequence. A reset of the spin memory is implemented in-between two successive sequences using optical repumping of the spins. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1510.06565v1-abstract-full').style.display = 'none'; document.getElementById('1510.06565v1-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 October, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2015. </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, 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/1405.5837">arXiv:1405.5837</a> <span> [<a href="https://arxiv.org/pdf/1405.5837">pdf</a>, <a href="https://arxiv.org/format/1405.5837">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</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.90.081117">10.1103/PhysRevB.90.081117 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Isotopic identification of engineered nitrogen-vacancy spin qubits in ultrapure diamond </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yamamoto%2C+T">T. Yamamoto</a>, <a href="/search/cond-mat?searchtype=author&query=Onoda%2C+S">S. Onoda</a>, <a href="/search/cond-mat?searchtype=author&query=Ohshima%2C+T">T. Ohshima</a>, <a href="/search/cond-mat?searchtype=author&query=Teraji%2C+T">T. Teraji</a>, <a href="/search/cond-mat?searchtype=author&query=Watanabe%2C+K">K. Watanabe</a>, <a href="/search/cond-mat?searchtype=author&query=Koizumi%2C+S">S. Koizumi</a>, <a href="/search/cond-mat?searchtype=author&query=Umeda%2C+T">T. Umeda</a>, <a href="/search/cond-mat?searchtype=author&query=McGuinness%2C+L+P">L. P. McGuinness</a>, <a href="/search/cond-mat?searchtype=author&query=M%C3%BCller%2C+C">C. M眉ller</a>, <a href="/search/cond-mat?searchtype=author&query=Naydenov%2C+B">B. Naydenov</a>, <a href="/search/cond-mat?searchtype=author&query=Dolde%2C+F">F. Dolde</a>, <a href="/search/cond-mat?searchtype=author&query=Fedder%2C+H">H. Fedder</a>, <a href="/search/cond-mat?searchtype=author&query=Honert%2C+J">J. Honert</a>, <a href="/search/cond-mat?searchtype=author&query=Markham%2C+M+L">M. L. Markham</a>, <a href="/search/cond-mat?searchtype=author&query=Twitchen%2C+D+J">D. J. Twitchen</a>, <a href="/search/cond-mat?searchtype=author&query=Wrachtrup%2C+J">J. Wrachtrup</a>, <a href="/search/cond-mat?searchtype=author&query=Jelezko%2C+F">F. Jelezko</a>, <a href="/search/cond-mat?searchtype=author&query=Isoya%2C+J">J. Isoya</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="1405.5837v2-abstract-short" style="display: inline;"> Nitrogen impurities help to stabilize the negatively-charged-state of NV$^-$ in diamond, whereas magnetic fluctuations from nitrogen spins lead to decoherence of NV$^-$ qubits. It is not known what donor concentration optimizes these conflicting requirements. Here we used 10-MeV $^{15}$N$^{3+}$ ion implantation to create NV$^-$ in ultrapure diamond. Optically detected magnetic resonance of single… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1405.5837v2-abstract-full').style.display = 'inline'; document.getElementById('1405.5837v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1405.5837v2-abstract-full" style="display: none;"> Nitrogen impurities help to stabilize the negatively-charged-state of NV$^-$ in diamond, whereas magnetic fluctuations from nitrogen spins lead to decoherence of NV$^-$ qubits. It is not known what donor concentration optimizes these conflicting requirements. Here we used 10-MeV $^{15}$N$^{3+}$ ion implantation to create NV$^-$ in ultrapure diamond. Optically detected magnetic resonance of single centers revealed a high creation yield of $40\pm3$% from $^{15}$N$^{3+}$ ions and an additional yield of $56\pm3$% from $^{14}$N impurities. High-temperature anneal was used to reduce residual defects, and charge stable NV$^-$, even in a dilute $^{14}$N impurity concentration of 0.06 ppb were created with long coherence times. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1405.5837v2-abstract-full').style.display = 'none'; document.getElementById('1405.5837v2-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 September, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 May, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 90, 081117 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1401.7939">arXiv:1401.7939</a> <span> [<a href="https://arxiv.org/pdf/1401.7939">pdf</a>, <a href="https://arxiv.org/format/1401.7939">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="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> </div> <p class="title is-5 mathjax"> Multi-mode storage and retrieval of microwave fields in a spin ensemble </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Grezes%2C+C">C. Grezes</a>, <a href="/search/cond-mat?searchtype=author&query=Julsgaard%2C+B">B. Julsgaard</a>, <a href="/search/cond-mat?searchtype=author&query=Kubo%2C+Y">Y. Kubo</a>, <a href="/search/cond-mat?searchtype=author&query=Stern%2C+M">M. Stern</a>, <a href="/search/cond-mat?searchtype=author&query=Umeda%2C+T">T. Umeda</a>, <a href="/search/cond-mat?searchtype=author&query=Isoya%2C+J">J. Isoya</a>, <a href="/search/cond-mat?searchtype=author&query=Sumiya%2C+H">H. Sumiya</a>, <a href="/search/cond-mat?searchtype=author&query=Abe%2C+H">H. Abe</a>, <a href="/search/cond-mat?searchtype=author&query=Onoda%2C+S">S. Onoda</a>, <a href="/search/cond-mat?searchtype=author&query=Ohshima%2C+T">T. Ohshima</a>, <a href="/search/cond-mat?searchtype=author&query=Jacques%2C+V">V. Jacques</a>, <a href="/search/cond-mat?searchtype=author&query=Esteve%2C+J">J. Esteve</a>, <a href="/search/cond-mat?searchtype=author&query=Vion%2C+D">D. Vion</a>, <a href="/search/cond-mat?searchtype=author&query=Esteve%2C+D">D. Esteve</a>, <a href="/search/cond-mat?searchtype=author&query=M%C3%B8lmer%2C+K">K. M酶lmer</a>, <a href="/search/cond-mat?searchtype=author&query=Bertet%2C+P">P. Bertet</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="1401.7939v1-abstract-short" style="display: inline;"> A quantum memory at microwave frequencies, able to store the state of multiple superconducting qubits for long times, is a key element for quantum information processing. Electronic and nuclear spins are natural candidates for the storage medium as their coherence time can be well above one second. Benefiting from these long coherence times requires to apply the refocusing techniques used in magne… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1401.7939v1-abstract-full').style.display = 'inline'; document.getElementById('1401.7939v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1401.7939v1-abstract-full" style="display: none;"> A quantum memory at microwave frequencies, able to store the state of multiple superconducting qubits for long times, is a key element for quantum information processing. Electronic and nuclear spins are natural candidates for the storage medium as their coherence time can be well above one second. Benefiting from these long coherence times requires to apply the refocusing techniques used in magnetic resonance, a major challenge in the context of hybrid quantum circuits. Here we report the first implementation of such a scheme, using ensembles of nitrogen-vacancy (NV) centres in diamond coupled to a superconducting resonator, in a setup compatible with superconducting qubit technology. We implement the active reset of the NV spins into their ground state by optical pumping and their refocusing by Hahn echo sequences. This enables the storage of multiple microwave pulses at the picoWatt level and their retrieval after up to $35 渭$s, a three orders of magnitude improvement compared to previous experiments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1401.7939v1-abstract-full').style.display = 'none'; document.getElementById('1401.7939v1-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> 30 January, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2014. </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 pages, 5 figures + Supplementary information (text and 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/1309.4316">arXiv:1309.4316</a> <span> [<a href="https://arxiv.org/pdf/1309.4316">pdf</a>, <a href="https://arxiv.org/format/1309.4316">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="Materials Science">cond-mat.mtrl-sci</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.88.075206">10.1103/PhysRevB.88.075206 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Extending spin coherence times of diamond qubits by high temperature annealing </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yamamoto%2C+T">T. Yamamoto</a>, <a href="/search/cond-mat?searchtype=author&query=Umeda%2C+T">T. Umeda</a>, <a href="/search/cond-mat?searchtype=author&query=Watanabe%2C+K">K. Watanabe</a>, <a href="/search/cond-mat?searchtype=author&query=Onoda%2C+S">S. Onoda</a>, <a href="/search/cond-mat?searchtype=author&query=Markham%2C+M+L">M. L. Markham</a>, <a href="/search/cond-mat?searchtype=author&query=Twitchen%2C+D+J">D. J. Twitchen</a>, <a href="/search/cond-mat?searchtype=author&query=Naydenov%2C+B">B. Naydenov</a>, <a href="/search/cond-mat?searchtype=author&query=McGuinness%2C+L+P">L. P. McGuinness</a>, <a href="/search/cond-mat?searchtype=author&query=Teraji%2C+T">T. Teraji</a>, <a href="/search/cond-mat?searchtype=author&query=Koizumi%2C+S">S. Koizumi</a>, <a href="/search/cond-mat?searchtype=author&query=Dolde%2C+F">F. Dolde</a>, <a href="/search/cond-mat?searchtype=author&query=Fedder%2C+H">H. Fedder</a>, <a href="/search/cond-mat?searchtype=author&query=Honert%2C+J">J. Honert</a>, <a href="/search/cond-mat?searchtype=author&query=Wrachtrup%2C+J">J. Wrachtrup</a>, <a href="/search/cond-mat?searchtype=author&query=Ohshima%2C+T">T. Ohshima</a>, <a href="/search/cond-mat?searchtype=author&query=Jelezko%2C+F">F. Jelezko</a>, <a href="/search/cond-mat?searchtype=author&query=Isoya%2C+J">J. Isoya</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="1309.4316v1-abstract-short" style="display: inline;"> Spins of negatively charged nitrogen-vacancy (NV$^-$) defects in diamond are among the most promising candidates for solid-state qubits. The fabrication of quantum devices containing these spin-carrying defects requires position-controlled introduction of NV$^-$ defects having excellent properties such as spectral stability, long spin coherence time, and stable negative charge state. Nitrogen ion… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1309.4316v1-abstract-full').style.display = 'inline'; document.getElementById('1309.4316v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1309.4316v1-abstract-full" style="display: none;"> Spins of negatively charged nitrogen-vacancy (NV$^-$) defects in diamond are among the most promising candidates for solid-state qubits. The fabrication of quantum devices containing these spin-carrying defects requires position-controlled introduction of NV$^-$ defects having excellent properties such as spectral stability, long spin coherence time, and stable negative charge state. Nitrogen ion implantation and annealing enable the positioning of NV$^-$ spin qubits with high precision, but to date, the coherence times of qubits produced this way are short, presumably because of the presence of residual radiation damage. In the present work, we demonstrate that a high temperature annealing at 1000$^\circ$C allows 2 millisecond coherence times to be achieved at room temperature. These results were obtained for implantation-produced NV$^-$ defects in a high-purity, 99.99% $^{12}$C enriched single crystal chemical vapor deposited diamond. We discuss these remarkably long coherence times in the context of the thermal behavior of residual defect spins. [Published in Physical Review B {\bf{88}}, 075206 (2013)] <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1309.4316v1-abstract-full').style.display = 'none'; document.getElementById('1309.4316v1-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> 17 September, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physical Review B {\bf{88}}, 075206 (2013) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1210.5047">arXiv:1210.5047</a> <span> [<a href="https://arxiv.org/pdf/1210.5047">pdf</a>, <a href="https://arxiv.org/format/1210.5047">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> Efficiently Engineered Room Temperature Single Photons in Silicon Carbide </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Castelletto%2C+S">S. Castelletto</a>, <a href="/search/cond-mat?searchtype=author&query=Johnson%2C+B+C">B. C. Johnson</a>, <a href="/search/cond-mat?searchtype=author&query=Stavrias%2C+N">N. Stavrias</a>, <a href="/search/cond-mat?searchtype=author&query=Umeda%2C+T">T. Umeda</a>, <a href="/search/cond-mat?searchtype=author&query=Ohshima%2C+T">T. Ohshima</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="1210.5047v1-abstract-short" style="display: inline;"> We report the first observation of stable single photon sources in silicon carbide (SiC). These sources are extremely bright and operate at room temperature demonstrating that SiC is a viable material in which to realize various quantum information, computation and photonic applications. The maximum single photon count rate detected is 700k counts/s with an inferred quantum efficiency around 70%.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1210.5047v1-abstract-full').style.display = 'inline'; document.getElementById('1210.5047v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1210.5047v1-abstract-full" style="display: none;"> We report the first observation of stable single photon sources in silicon carbide (SiC). These sources are extremely bright and operate at room temperature demonstrating that SiC is a viable material in which to realize various quantum information, computation and photonic applications. The maximum single photon count rate detected is 700k counts/s with an inferred quantum efficiency around 70%. The single photon sources are due to intrinsic deep level defects constituted of carbon antisite-vacancy pairs. These are shown to be formed controllably by electron irradiation. The variability of the temporal kinetics of these single defects is investigated in detail. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1210.5047v1-abstract-full').style.display = 'none'; document.getElementById('1210.5047v1-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 October, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2012. </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 pages + 3 pages (supplementary)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1206.4260">arXiv:1206.4260</a> <span> [<a href="https://arxiv.org/pdf/1206.4260">pdf</a>, <a href="https://arxiv.org/ps/1206.4260">ps</a>, <a href="https://arxiv.org/format/1206.4260">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="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</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/10.1063/1.4731778">10.1063/1.4731778 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Long coherence time of spin qubits in $^{12}$C enriched polycrystalline CVD diamond </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Jahnke%2C+K+D">K. D. Jahnke</a>, <a href="/search/cond-mat?searchtype=author&query=Naydenov%2C+B">B. Naydenov</a>, <a href="/search/cond-mat?searchtype=author&query=Teraji%2C+T">T. Teraji</a>, <a href="/search/cond-mat?searchtype=author&query=Koizumi%2C+S">S. Koizumi</a>, <a href="/search/cond-mat?searchtype=author&query=Umeda%2C+T">T. Umeda</a>, <a href="/search/cond-mat?searchtype=author&query=Isoya%2C+J">J. Isoya</a>, <a href="/search/cond-mat?searchtype=author&query=Jelezko%2C+F">F. Jelezko</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="1206.4260v1-abstract-short" style="display: inline;"> Single defects in diamond and especially negatively charged nitrogen vacancy (NV) centers are very promising quantum systems with wide applications in physics and biology. It was shown that their coherence properties can be strongly improved by growing ultrapure diamond with low concentration of parasitic spins associated with nitrogen electron spins and nuclear spins related to $^{13}$C carbon is… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1206.4260v1-abstract-full').style.display = 'inline'; document.getElementById('1206.4260v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1206.4260v1-abstract-full" style="display: none;"> Single defects in diamond and especially negatively charged nitrogen vacancy (NV) centers are very promising quantum systems with wide applications in physics and biology. It was shown that their coherence properties can be strongly improved by growing ultrapure diamond with low concentration of parasitic spins associated with nitrogen electron spins and nuclear spins related to $^{13}$C carbon isotope. Here we report a high quality $^{12}$C-enriched polycrystalline CVD diamond material with properties comparable with single crystals. We find single NVs in the grains of this material, which show extremely long electron spin coherence time $T_2 > 2\,ms$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1206.4260v1-abstract-full').style.display = 'none'; document.getElementById('1206.4260v1-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 June, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2012. </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">Accepted for publication in APL</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1205.5659">arXiv:1205.5659</a> <span> [<a href="https://arxiv.org/pdf/1205.5659">pdf</a>, <a href="https://arxiv.org/format/1205.5659">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="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</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.86.064514">10.1103/PhysRevB.86.064514 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Electron spin resonance detected by a superconducting qubit </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kubo%2C+Y">Y. Kubo</a>, <a href="/search/cond-mat?searchtype=author&query=Diniz%2C+I">I. Diniz</a>, <a href="/search/cond-mat?searchtype=author&query=Grezes%2C+C">C. Grezes</a>, <a href="/search/cond-mat?searchtype=author&query=Umeda%2C+T">T. Umeda</a>, <a href="/search/cond-mat?searchtype=author&query=Isoya%2C+J">J. Isoya</a>, <a href="/search/cond-mat?searchtype=author&query=Sumiya%2C+H">H. Sumiya</a>, <a href="/search/cond-mat?searchtype=author&query=Yamamoto%2C+T">T. Yamamoto</a>, <a href="/search/cond-mat?searchtype=author&query=Abe%2C+H">H. Abe</a>, <a href="/search/cond-mat?searchtype=author&query=Onoda%2C+S">S. Onoda</a>, <a href="/search/cond-mat?searchtype=author&query=Ohshima%2C+T">T. Ohshima</a>, <a href="/search/cond-mat?searchtype=author&query=Jacques%2C+V">V. Jacques</a>, <a href="/search/cond-mat?searchtype=author&query=Dr%C3%A9au%2C+A">A. Dr茅au</a>, <a href="/search/cond-mat?searchtype=author&query=Roch%2C+J+-">J. -F. Roch</a>, <a href="/search/cond-mat?searchtype=author&query=Auffeves%2C+A">A. Auffeves</a>, <a href="/search/cond-mat?searchtype=author&query=Vion%2C+D">D. Vion</a>, <a href="/search/cond-mat?searchtype=author&query=Esteve%2C+D">D. Esteve</a>, <a href="/search/cond-mat?searchtype=author&query=Bertet%2C+P">P. Bertet</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="1205.5659v1-abstract-short" style="display: inline;"> A new method for detecting the magnetic resonance of electronic spins at low temperature is demonstrated. It consists in measuring the signal emitted by the spins with a superconducting qubit that acts as a single-microwave-photon detector, resulting in an enhanced sensitivity. We implement this new type of electron-spin resonance spectroscopy using a hybrid quantum circuit in which a transmon qub… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1205.5659v1-abstract-full').style.display = 'inline'; document.getElementById('1205.5659v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1205.5659v1-abstract-full" style="display: none;"> A new method for detecting the magnetic resonance of electronic spins at low temperature is demonstrated. It consists in measuring the signal emitted by the spins with a superconducting qubit that acts as a single-microwave-photon detector, resulting in an enhanced sensitivity. We implement this new type of electron-spin resonance spectroscopy using a hybrid quantum circuit in which a transmon qubit is coupled to a spin ensemble consisting of NV centers in diamond. With this setup we measure the NV center absorption spectrum at 30mK at an excitation level of \thicksim15\,渭_{B} out of an ensemble of 10^{11} spins. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1205.5659v1-abstract-full').style.display = 'none'; document.getElementById('1205.5659v1-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 May, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2012. </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 pages, 4 figures, submitted to PRX</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1110.2978">arXiv:1110.2978</a> <span> [<a href="https://arxiv.org/pdf/1110.2978">pdf</a>, <a href="https://arxiv.org/format/1110.2978">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="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</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.107.220501">10.1103/PhysRevLett.107.220501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Hybrid quantum circuit with a superconducting qubit coupled to a spin ensemble </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kubo%2C+Y">Y. Kubo</a>, <a href="/search/cond-mat?searchtype=author&query=Grezes%2C+C">C. Grezes</a>, <a href="/search/cond-mat?searchtype=author&query=Dewes%2C+A">A. Dewes</a>, <a href="/search/cond-mat?searchtype=author&query=Umeda%2C+T">T. Umeda</a>, <a href="/search/cond-mat?searchtype=author&query=Isoya%2C+J">J. Isoya</a>, <a href="/search/cond-mat?searchtype=author&query=Sumiya%2C+H">H. Sumiya</a>, <a href="/search/cond-mat?searchtype=author&query=Morishita%2C+N">N. Morishita</a>, <a href="/search/cond-mat?searchtype=author&query=Abe%2C+H">H. Abe</a>, <a href="/search/cond-mat?searchtype=author&query=Onoda%2C+S">S. Onoda</a>, <a href="/search/cond-mat?searchtype=author&query=Ohshima%2C+T">T. Ohshima</a>, <a href="/search/cond-mat?searchtype=author&query=Jacques%2C+V">V. Jacques</a>, <a href="/search/cond-mat?searchtype=author&query=Dr%C3%A9au%2C+A">A. Dr茅au</a>, <a href="/search/cond-mat?searchtype=author&query=Roch%2C+J+-">J. -F. Roch</a>, <a href="/search/cond-mat?searchtype=author&query=Diniz%2C+I">I. Diniz</a>, <a href="/search/cond-mat?searchtype=author&query=Auffeves%2C+A">A. Auffeves</a>, <a href="/search/cond-mat?searchtype=author&query=Vion%2C+D">D. Vion</a>, <a href="/search/cond-mat?searchtype=author&query=Esteve%2C+D">D. Esteve</a>, <a href="/search/cond-mat?searchtype=author&query=Bertet%2C+P">P. Bertet</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="1110.2978v1-abstract-short" style="display: inline;"> We report the experimental realization of a hybrid quantum circuit combining a superconducting qubit and an ensemble of electronic spins. The qubit, of the transmon type, is coherently coupled to the spin ensemble consisting of nitrogen-vacancy (NV) centers in a diamond crystal via a frequency-tunable superconducting resonator acting as a quantum bus. Using this circuit, we prepare arbitrary super… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1110.2978v1-abstract-full').style.display = 'inline'; document.getElementById('1110.2978v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1110.2978v1-abstract-full" style="display: none;"> We report the experimental realization of a hybrid quantum circuit combining a superconducting qubit and an ensemble of electronic spins. The qubit, of the transmon type, is coherently coupled to the spin ensemble consisting of nitrogen-vacancy (NV) centers in a diamond crystal via a frequency-tunable superconducting resonator acting as a quantum bus. Using this circuit, we prepare arbitrary superpositions of the qubit states that we store into collective excitations of the spin ensemble and retrieve back later on into the qubit. These results constitute a first proof of concept of spin-ensemble based quantum memory for superconducting qubits. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1110.2978v1-abstract-full').style.display = 'none'; document.getElementById('1110.2978v1-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, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2011. </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, plus supplementary information</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 107, 220501 (2011) </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg> <a href="https://info.arxiv.org/help/contact.html"> Contact</a> </li> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>subscribe to arXiv mailings</title><desc>Click here to subscribe</desc><path d="M476 3.2L12.5 270.6c-18.1 10.4-15.8 35.6 2.2 43.2L121 358.4l287.3-253.2c5.5-4.9 13.3 2.6 8.6 8.3L176 407v80.5c0 23.6 28.5 32.9 42.5 15.8L282 426l124.6 52.2c14.2 6 30.4-2.9 33-18.2l72-432C515 7.8 493.3-6.8 476 3.2z"/></svg> <a href="https://info.arxiv.org/help/subscribe"> Subscribe</a> </li> </ul> </div> </div> </div>   <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/license/index.html">Copyright</a></li> <li><a href="https://info.arxiv.org/help/policies/privacy_policy.html">Privacy Policy</a></li> </ul> </div> <div class="column sorry-app-links"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/web_accessibility.html">Web Accessibility Assistance</a></li> <li> <p class="help"> <a class="a11y-main-link" href="https://status.arxiv.org" target="_blank">arXiv Operational Status <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 512" class="icon filter-dark_grey" role="presentation"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z"/></svg></a><br> Get status notifications via <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/email/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg>email</a> or <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/slack/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512" class="icon filter-black" role="presentation"><path d="M94.12 315.1c0 25.9-21.16 47.06-47.06 47.06S0 341 0 315.1c0-25.9 21.16-47.06 47.06-47.06h47.06v47.06zm23.72 0c0-25.9 21.16-47.06 47.06-47.06s47.06 21.16 47.06 47.06v117.84c0 25.9-21.16 47.06-47.06 47.06s-47.06-21.16-47.06-47.06V315.1zm47.06-188.98c-25.9 0-47.06-21.16-47.06-47.06S139 32 164.9 32s47.06 21.16 47.06 47.06v47.06H164.9zm0 23.72c25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06H47.06C21.16 243.96 0 222.8 0 196.9s21.16-47.06 47.06-47.06H164.9zm188.98 47.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06h-47.06V196.9zm-23.72 0c0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06V79.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06V196.9zM283.1 385.88c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06v-47.06h47.06zm0-23.72c-25.9 0-47.06-21.16-47.06-47.06 0-25.9 21.16-47.06 47.06-47.06h117.84c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06H283.1z"/></svg>slack</a> </p> </li> </ul> </div> </div> </div>  </div> </footer> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/member_acknowledgement.js"></script> </body> </html>

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