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</div> <div class="control"> <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/2502.12832">arXiv:2502.12832</a> <span> [<a href="https://arxiv.org/pdf/2502.12832">pdf</a>, <a href="https://arxiv.org/format/2502.12832">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="High Energy Physics - Experiment">hep-ex</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="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Highly charged isomeric qubits from antiproton annihilation </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Alfaro%2C+S">Sara Alfaro</a>, <a href="/search/physics?searchtype=author&query=Panzl%2C+L">Lorenz Panzl</a>, <a href="/search/physics?searchtype=author&query=Zieli%C5%84ski%2C+J">Jakub Zieli艅ski</a>, <a href="/search/physics?searchtype=author&query=Choudapurkar%2C+S">Sankarshan Choudapurkar</a>, <a href="/search/physics?searchtype=author&query=Gustafsson%2C+F+P">Fredrik Parnefjord Gustafsson</a>, <a href="/search/physics?searchtype=author&query=Germann%2C+M">Matthias Germann</a>, <a href="/search/physics?searchtype=author&query=Faorlin%2C+T">Tommaso Faorlin</a>, <a href="/search/physics?searchtype=author&query=Weiser%2C+Y">Yannick Weiser</a>, <a href="/search/physics?searchtype=author&query=Lafenthaler%2C+T">Thomas Lafenthaler</a>, <a href="/search/physics?searchtype=author&query=Monz%2C+T">Thomas Monz</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">Michael Doser</a>, <a href="/search/physics?searchtype=author&query=Kornakov%2C+G">Georgy Kornakov</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">Giovanni Cerchiari</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="2502.12832v1-abstract-short" style="display: inline;"> We describe how the annihilation of antiprotons can be utilized to generate highly charged synthetic qubits in an ion-trap setup. We identify the qubit transitions in the hyperfine splitting of Hydrogen-like atoms composed of an isomer and a single electron in the ground state. We identify promising candidates in the isomers of Y, Nb, Rh, In, and Sb, for which the hyperfine transition lies in the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.12832v1-abstract-full').style.display = 'inline'; document.getElementById('2502.12832v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.12832v1-abstract-full" style="display: none;"> We describe how the annihilation of antiprotons can be utilized to generate highly charged synthetic qubits in an ion-trap setup. We identify the qubit transitions in the hyperfine splitting of Hydrogen-like atoms composed of an isomer and a single electron in the ground state. We identify promising candidates in the isomers of Y, Nb, Rh, In, and Sb, for which the hyperfine transition lies in the infrared and whose excited state level lifetime is in the hundreds of milliseconds, which is suitable for metrology applications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.12832v1-abstract-full').style.display = 'none'; document.getElementById('2502.12832v1-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 February, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 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">11 pages, 2 figures, 6 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2409.01058">arXiv:2409.01058</a> <span> [<a href="https://arxiv.org/pdf/2409.01058">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link 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="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/10.1063/5.0196806">10.1063/5.0196806 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> TALOS (Total Automation of LabVIEW Operations for Science): A framework for autonomous control systems for complex experiments </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Volponi%2C+M">M. Volponi</a>, <a href="/search/physics?searchtype=author&query=Zieli%C5%84ski%2C+J">J. Zieli艅ski</a>, <a href="/search/physics?searchtype=author&query=Rauschendorfer%2C+T">T. Rauschendorfer</a>, <a href="/search/physics?searchtype=author&query=Huck%2C+S">S. Huck</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Auzins%2C+M">M. Auzins</a>, <a href="/search/physics?searchtype=author&query=Bergmann%2C+B">B. Bergmann</a>, <a href="/search/physics?searchtype=author&query=Burian%2C+P">P. Burian</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Camper%2C+A">A. Camper</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Ciury%C5%82o%2C+R">R. Ciury艂o</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Eliaszuk%2C+K">K. Eliaszuk</a>, <a href="/search/physics?searchtype=author&query=Giszczak%2C+A">A. Giszczak</a>, <a href="/search/physics?searchtype=author&query=Gl%C3%B6ggler%2C+L+T">L. T. Gl枚ggler</a>, <a href="/search/physics?searchtype=author&query=Graczykowski%2C+%C5%81">艁. Graczykowski</a>, <a href="/search/physics?searchtype=author&query=Grosbart%2C+M">M. Grosbart</a>, <a href="/search/physics?searchtype=author&query=Guatieri%2C+F">F. Guatieri</a>, <a href="/search/physics?searchtype=author&query=Gusakova%2C+N">N. Gusakova</a>, <a href="/search/physics?searchtype=author&query=Gustafsson%2C+F">F. Gustafsson</a>, <a href="/search/physics?searchtype=author&query=Haider%2C+S">S. Haider</a>, <a href="/search/physics?searchtype=author&query=Janik%2C+M+A">M. A. Janik</a> , et al. (30 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="2409.01058v1-abstract-short" style="display: inline;"> Modern physics experiments are frequently very complex, relying on multiple simultaneous events to happen in order to obtain the desired result. The experiment control system plays a central role in orchestrating the measurement setup: However, its development is often treated as secondary with respect to the hardware, its importance becoming evident only during the operational phase. Therefore, t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.01058v1-abstract-full').style.display = 'inline'; document.getElementById('2409.01058v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.01058v1-abstract-full" style="display: none;"> Modern physics experiments are frequently very complex, relying on multiple simultaneous events to happen in order to obtain the desired result. The experiment control system plays a central role in orchestrating the measurement setup: However, its development is often treated as secondary with respect to the hardware, its importance becoming evident only during the operational phase. Therefore, the AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) collaboration has created a framework for easily coding control systems, specifically targeting atomic, quantum, and antimatter experiments. This framework, called Total Automation of LabVIEW Operations for Science (TALOS), unifies all the machines of the experiment in a single entity, thus enabling complex high-level decisions to be taken, and it is constituted by separate modules, called MicroServices, that run concurrently and asynchronously. This enhances the stability and reproducibility of the system while allowing for continuous integration and testing while the control system is running. The system demonstrated high stability and reproducibility, running completely unsupervised during the night and weekends of the data-taking campaigns. The results demonstrate the suitability of TALOS to manage an entire physics experiment in full autonomy: being open-source, experiments other than the AEgIS experiment can benefit from it. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.01058v1-abstract-full').style.display = 'none'; document.getElementById('2409.01058v1-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 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Rev. Sci. Instrum. 95, 085116 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.16044">arXiv:2406.16044</a> <span> [<a href="https://arxiv.org/pdf/2406.16044">pdf</a>, <a href="https://arxiv.org/format/2406.16044">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 Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Real-time antiproton annihilation vertexing with sub-micron resolution </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Berghold%2C+M">M. Berghold</a>, <a href="/search/physics?searchtype=author&query=Orsucci%2C+D">D. Orsucci</a>, <a href="/search/physics?searchtype=author&query=Guatieri%2C+F">F. Guatieri</a>, <a href="/search/physics?searchtype=author&query=Alfaro%2C+S">S. Alfaro</a>, <a href="/search/physics?searchtype=author&query=Auzins%2C+M">M. Auzins</a>, <a href="/search/physics?searchtype=author&query=Bergmann%2C+B">B. Bergmann</a>, <a href="/search/physics?searchtype=author&query=Burian%2C+P">P. Burian</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Camper%2C+A">A. Camper</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Ciury%C5%82o%2C+R">R. Ciury艂o</a>, <a href="/search/physics?searchtype=author&query=Chehaimi%2C+A">A. Chehaimi</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Eliaszuk%2C+K">K. Eliaszuk</a>, <a href="/search/physics?searchtype=author&query=Ferguson%2C+R">R. Ferguson</a>, <a href="/search/physics?searchtype=author&query=Germann%2C+M">M. Germann</a>, <a href="/search/physics?searchtype=author&query=Giszczak%2C+A">A. Giszczak</a>, <a href="/search/physics?searchtype=author&query=Gl%C3%B6ggler%2C+L+T">L. T. Gl枚ggler</a>, <a href="/search/physics?searchtype=author&query=Graczykowski%2C+%C5%81">艁. Graczykowski</a>, <a href="/search/physics?searchtype=author&query=Grosbart%2C+M">M. Grosbart</a>, <a href="/search/physics?searchtype=author&query=Guatieri%2C+F">F. Guatieri</a>, <a href="/search/physics?searchtype=author&query=Gusakova%2C+N">N. Gusakova</a> , et al. (42 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="2406.16044v1-abstract-short" style="display: inline;"> The primary goal of the AEgIS experiment is to precisely measure the free fall of antihydrogen within Earth's gravitational field. To this end, a cold ~50K antihydrogen beam has to pass through two grids forming a moir茅 deflectometer before annihilating onto a position-sensitive detector, which shall determine the vertical position of the annihilation vertex relative to the grids with micrometric… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.16044v1-abstract-full').style.display = 'inline'; document.getElementById('2406.16044v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.16044v1-abstract-full" style="display: none;"> The primary goal of the AEgIS experiment is to precisely measure the free fall of antihydrogen within Earth's gravitational field. To this end, a cold ~50K antihydrogen beam has to pass through two grids forming a moir茅 deflectometer before annihilating onto a position-sensitive detector, which shall determine the vertical position of the annihilation vertex relative to the grids with micrometric accuracy. Here we introduce a vertexing detector based on a modified mobile camera sensor and experimentally demonstrate that it can measure the position of antiproton annihilations with an accuracy of $0.62^{+0.40}_{-0.22}渭m$, which represents a 35-fold improvement over the previous state-of-the-art for real-time antiproton vertexing. Importantly, these antiproton detection methods are directly applicable to antihydrogen. Moreover, the sensitivity to light of the sensor enables the in-situ calibration of the moir茅 deflectometer, significantly reducing systematic errors. This sensor emerges as a breakthrough technology for achieving the \aegis scientific goals and has been selected as the basis for the development of a large-area detector for conducting antihydrogen gravity measurements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.16044v1-abstract-full').style.display = 'none'; document.getElementById('2406.16044v1-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">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">21 pages, 4 figures, 2 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2209.02596">arXiv:2209.02596</a> <span> [<a href="https://arxiv.org/pdf/2209.02596">pdf</a>, <a href="https://arxiv.org/format/2209.02596">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="Nuclear Theory">nucl-th</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/PhysRevC.107.034314">10.1103/PhysRevC.107.034314 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Synthesis of cold and trappable fully stripped HCI's via antiproton-induced nuclear fragmentation in traps </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kornakov%2C+G">G. Kornakov</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Zieli%C5%84ski%2C+J">J. Zieli艅ski</a>, <a href="/search/physics?searchtype=author&query=Lappo%2C+L">L. Lappo</a>, <a href="/search/physics?searchtype=author&query=Sadowski%2C+G">G. Sadowski</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</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="2209.02596v1-abstract-short" style="display: inline;"> The study of radioisotopes as well as of highly charged ions is a very active and dynamic field. In both cases, the most sensitive probes involve species trapped in Penning or Paul traps after a lengthy series of production and separation steps that limit the types and lifetimes of species that can be investigated. We propose a novel production scheme that forms fully (or almost fully) stripped ra… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.02596v1-abstract-full').style.display = 'inline'; document.getElementById('2209.02596v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2209.02596v1-abstract-full" style="display: none;"> The study of radioisotopes as well as of highly charged ions is a very active and dynamic field. In both cases, the most sensitive probes involve species trapped in Penning or Paul traps after a lengthy series of production and separation steps that limit the types and lifetimes of species that can be investigated. We propose a novel production scheme that forms fully (or almost fully) stripped radionuclei in form of highly charged ions (HCI's) directly in the trapping environment. The method extends the range of species, among them radioisotopes such as $^{21}$F, $^{100}$Sn or $^{229}$Th, that can be readily produced and investigated and is complementary to existing techniques. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.02596v1-abstract-full').style.display = 'none'; document.getElementById('2209.02596v1-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 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">9 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/2112.14990">arXiv:2112.14990</a> <span> [<a href="https://arxiv.org/pdf/2112.14990">pdf</a>, <a href="https://arxiv.org/format/2112.14990">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="Instrumentation and Detectors">physics.ins-det</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.129.013601">10.1103/PhysRevLett.129.013601 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Position measurement of a levitated nanoparticle via interference with its mirror image </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Dania%2C+L">Lorenzo Dania</a>, <a href="/search/physics?searchtype=author&query=Heidegger%2C+K">Katharina Heidegger</a>, <a href="/search/physics?searchtype=author&query=Bykov%2C+D+S">Dmitry S. Bykov</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">Giovanni Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Araneda%2C+G">Gabriel Araneda</a>, <a href="/search/physics?searchtype=author&query=Northup%2C+T+E">Tracy E. Northup</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="2112.14990v1-abstract-short" style="display: inline;"> Interferometric methods for detecting the motion of a levitated nanoparticle provide a route to the quantum ground state, but such methods are currently limited by mode mismatch between the reference beam and the dipolar field scattered by the particle. Here we demonstrate a self-interference method to detect the particle's motion that solves this problem. A Paul trap confines a charged dielectric… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.14990v1-abstract-full').style.display = 'inline'; document.getElementById('2112.14990v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2112.14990v1-abstract-full" style="display: none;"> Interferometric methods for detecting the motion of a levitated nanoparticle provide a route to the quantum ground state, but such methods are currently limited by mode mismatch between the reference beam and the dipolar field scattered by the particle. Here we demonstrate a self-interference method to detect the particle's motion that solves this problem. A Paul trap confines a charged dielectric nanoparticle in high vacuum, and a mirror retro-reflects the scattered light. We measure the particle's motion with a sensitivity of $1.7\times 10^{-12} \text{m}/\sqrt{\text{Hz}}$, corresponding to a detection efficiency of 2.1%, with a numerical aperture of 0.18. As an application of this method, we cool the particle, via feedback, to temperatures below those achieved in the same setup using a standard position measurement. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.14990v1-abstract-full').style.display = 'none'; document.getElementById('2112.14990v1-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 December, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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">12 pages, 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/2104.07447">arXiv:2104.07447</a> <span> [<a href="https://arxiv.org/pdf/2104.07447">pdf</a>, <a href="https://arxiv.org/format/2104.07447">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="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/10.1063/5.0052099">10.1063/5.0052099 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Motion analysis of a trapped ion chain by single photon self-interference </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Araneda%2C+G">G. Araneda</a>, <a href="/search/physics?searchtype=author&query=Podhora%2C+L">L. Podhora</a>, <a href="/search/physics?searchtype=author&query=Slodi%C4%8Dka%2C+L">L. Slodi膷ka</a>, <a href="/search/physics?searchtype=author&query=Colombe%2C+Y">Y. Colombe</a>, <a href="/search/physics?searchtype=author&query=Blatt%2C+R">R. Blatt</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="2104.07447v1-abstract-short" style="display: inline;"> We present an optical scheme to detect the oscillations of a two-ion string confined in a linear Paul trap. The motion is detected by analyzing the intensity correlations in the fluorescence light emitted by one or two ions in the string. We present measurements performed under continuous Doppler cooling and under pulsed illumination. We foresee several direct applications of this detection method… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.07447v1-abstract-full').style.display = 'inline'; document.getElementById('2104.07447v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2104.07447v1-abstract-full" style="display: none;"> We present an optical scheme to detect the oscillations of a two-ion string confined in a linear Paul trap. The motion is detected by analyzing the intensity correlations in the fluorescence light emitted by one or two ions in the string. We present measurements performed under continuous Doppler cooling and under pulsed illumination. We foresee several direct applications of this detection method, including motional analysis of multi-ion species or coupled mechanical oscillators, and sensing of mechanical correlations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.07447v1-abstract-full').style.display = 'none'; document.getElementById('2104.07447v1-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> 15 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 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 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Appl. Phys. Lett. 119, 024003 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2103.08322">arXiv:2103.08322</a> <span> [<a href="https://arxiv.org/pdf/2103.08322">pdf</a>, <a href="https://arxiv.org/format/2103.08322">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/10.1103/PhysRevA.104.053523">10.1103/PhysRevA.104.053523 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Position measurement of a dipolar scatterer via self-homodyne detection </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Dania%2C+L">L. Dania</a>, <a href="/search/physics?searchtype=author&query=Bykov%2C+D+S">D. S. Bykov</a>, <a href="/search/physics?searchtype=author&query=Blatt%2C+R">R. Blatt</a>, <a href="/search/physics?searchtype=author&query=Northup%2C+T">T. Northup</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="2103.08322v2-abstract-short" style="display: inline;"> We describe a technique to measure the position of a dipolar scatterer based on self-homodyne detection of the scattered light. The method can theoretically reach the Heisenberg limit, at which information gained about the position is constrained only by the back-action of the scattered light. The technique has applications in the fields of levitated optomechanics and trapped ions and is generally… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.08322v2-abstract-full').style.display = 'inline'; document.getElementById('2103.08322v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2103.08322v2-abstract-full" style="display: none;"> We describe a technique to measure the position of a dipolar scatterer based on self-homodyne detection of the scattered light. The method can theoretically reach the Heisenberg limit, at which information gained about the position is constrained only by the back-action of the scattered light. The technique has applications in the fields of levitated optomechanics and trapped ions and is generally applicable to the position determination of confined light scatterers. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.08322v2-abstract-full').style.display = 'none'; document.getElementById('2103.08322v2-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, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 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">11 pages, 5 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/2012.05695">arXiv:2012.05695</a> <span> [<a href="https://arxiv.org/pdf/2012.05695">pdf</a>, <a href="https://arxiv.org/ps/2012.05695">ps</a>, <a href="https://arxiv.org/format/2012.05695">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computer Vision and Pattern Recognition">cs.CV</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Image and Video Processing">eess.IV</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Data Analysis, Statistics and Probability">physics.data-an</span> </div> </div> <p class="title is-5 mathjax"> Increased performance in DDM analysis by calculating structure functions through Fourier transform in time </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Norouzisadeh%2C+M">M. Norouzisadeh</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Croccolo%2C+F">F. Croccolo</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="2012.05695v1-abstract-short" style="display: inline;"> Differential Dynamic Microscopy (DDM) is the combination of optical microscopy to statistical analysis to obtain information about the dynamical behaviour of a variety of samples spanning from soft matter physics to biology. In DDM, the dynamical evolution of the samples is investigated separately at different length scales and extracted from a set of images recorded at different times. A specific… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.05695v1-abstract-full').style.display = 'inline'; document.getElementById('2012.05695v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2012.05695v1-abstract-full" style="display: none;"> Differential Dynamic Microscopy (DDM) is the combination of optical microscopy to statistical analysis to obtain information about the dynamical behaviour of a variety of samples spanning from soft matter physics to biology. In DDM, the dynamical evolution of the samples is investigated separately at different length scales and extracted from a set of images recorded at different times. A specific result of interest is the structure function that can be computed via spatial Fourier transforms and differences of signals. In this work, we present an algorithm to efficiently process a set of images according to the DDM analysis scheme. We bench-marked the new approach against the state-of-the-art algorithm reported in previous work. The new implementation computes the DDM analysis faster, thanks to an additional Fourier transform in time instead of performing differences of signals. This allows obtaining very fast analysis also in CPU based machine. In order to test the new code, we performed the DDM analysis over sets of more than 1000 images with and without the help of GPU hardware acceleration. As an example, for images of $512 \times 512$ pixels, the new algorithm is 10 times faster than the previous GPU code. Without GPU hardware acceleration and for the same set of images, we found that the new algorithm is 300 faster than the old one both running only on the CPU. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.05695v1-abstract-full').style.display = 'none'; document.getElementById('2012.05695v1-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 December, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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">6 pages, 5 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/2009.14098">arXiv:2009.14098</a> <span> [<a href="https://arxiv.org/pdf/2009.14098">pdf</a>, <a href="https://arxiv.org/format/2009.14098">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/10.1103/PhysRevLett.127.063603">10.1103/PhysRevLett.127.063603 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measuring ion oscillations at the quantum level with fluorescence light </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Araneda%2C+G">G. Araneda</a>, <a href="/search/physics?searchtype=author&query=Podhora%2C+L">L. Podhora</a>, <a href="/search/physics?searchtype=author&query=Slodi%C4%8Dka%2C+L">L. Slodi膷ka</a>, <a href="/search/physics?searchtype=author&query=Colombe%2C+Y">Y. Colombe</a>, <a href="/search/physics?searchtype=author&query=Blatt%2C+R">R. Blatt</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="2009.14098v1-abstract-short" style="display: inline;"> We demonstrate an optical method for detecting the mechanical oscillations of an atom with single-phonon sensitivity. The measurement signal results from the interference between the light scattered by a single trapped atomic ion and that of its mirror image. The motion of the atom modulates the interference path length and hence the photon detection rate. We detect the oscillations of the atom in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.14098v1-abstract-full').style.display = 'inline'; document.getElementById('2009.14098v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2009.14098v1-abstract-full" style="display: none;"> We demonstrate an optical method for detecting the mechanical oscillations of an atom with single-phonon sensitivity. The measurement signal results from the interference between the light scattered by a single trapped atomic ion and that of its mirror image. The motion of the atom modulates the interference path length and hence the photon detection rate. We detect the oscillations of the atom in the Doppler cooling limit and reconstruct average trajectories in phase space. We demonstrate single-phonon sensitivity near the ground state of motion after EIT cooling. These results could be applied for motion detection of other light scatterers of fundamental interest, such as trapped nanoparticles. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.14098v1-abstract-full').style.display = 'none'; document.getElementById('2009.14098v1-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> 29 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">11 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. 127, 063603 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2006.04828">arXiv:2006.04828</a> <span> [<a href="https://arxiv.org/pdf/2006.04828">pdf</a>, <a href="https://arxiv.org/format/2006.04828">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="Instrumentation and Detectors">physics.ins-det</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/10.1063/5.0020661">10.1063/5.0020661 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Panopticon device: an integrated Paul-trap-hemispherical mirror system for quantum optics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Araneda%2C+G">Gabriel Araneda</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">Giovanni Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Higginbottom%2C+D+B">Daniel B. Higginbottom</a>, <a href="/search/physics?searchtype=author&query=Holz%2C+P+C">Philip C. Holz</a>, <a href="/search/physics?searchtype=author&query=Lakhmanskiy%2C+K">Kirill Lakhmanskiy</a>, <a href="/search/physics?searchtype=author&query=Ob%C5%A1il%2C+P">Petr Ob拧il</a>, <a href="/search/physics?searchtype=author&query=Colombe%2C+Y">Yves Colombe</a>, <a href="/search/physics?searchtype=author&query=Blatt%2C+R">Rainer Blatt</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="2006.04828v3-abstract-short" style="display: inline;"> We present the design and construction of a new experimental apparatus for the trapping of single Ba$^+$ ions in the center of curvature of an optical-quality hemispherical mirror. We describe the layout, fabrication and integration of the full setup, consisting of a high-optical access monolithic `3D-printed' Paul trap, the hemispherical mirror, a diffraction-limited in-vacuum lens (NA = 0.7) for… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.04828v3-abstract-full').style.display = 'inline'; document.getElementById('2006.04828v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.04828v3-abstract-full" style="display: none;"> We present the design and construction of a new experimental apparatus for the trapping of single Ba$^+$ ions in the center of curvature of an optical-quality hemispherical mirror. We describe the layout, fabrication and integration of the full setup, consisting of a high-optical access monolithic `3D-printed' Paul trap, the hemispherical mirror, a diffraction-limited in-vacuum lens (NA = 0.7) for collection of atomic fluorescence and a state-of-the art ultra-high vacuum vessel. This new apparatus enables the study of quantum electrodynamics effects such as strong inhibition and enhancement of spontaneous emission, and achieves a collection efficiency of the emitted light in a single optical mode of 31%. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.04828v3-abstract-full').style.display = 'none'; document.getElementById('2006.04828v3-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 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 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">16 pages, 17 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/1904.09004">arXiv:1904.09004</a> <span> [<a href="https://arxiv.org/pdf/1904.09004">pdf</a>, <a href="https://arxiv.org/format/1904.09004">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="High Energy Physics - Experiment">hep-ex</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.100.063414">10.1103/PhysRevA.100.063414 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Efficient $2^3S$ positronium production by stimulated decay from the $3^3P$ level </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Antonello%2C+M">M. Antonello</a>, <a href="/search/physics?searchtype=author&query=Belov%2C+A">A. Belov</a>, <a href="/search/physics?searchtype=author&query=Bonomi%2C+G">G. Bonomi</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Caccia%2C+M">M. Caccia</a>, <a href="/search/physics?searchtype=author&query=Camper%2C+A">A. Camper</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Comparat%2C+D">D. Comparat</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Demetrio%2C+A">A. Demetrio</a>, <a href="/search/physics?searchtype=author&query=Di+Noto%2C+L">L. Di Noto</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Fan%C3%AC%2C+M">M. Fan矛</a>, <a href="/search/physics?searchtype=author&query=Gerber%2C+S">S. Gerber</a>, <a href="/search/physics?searchtype=author&query=Gligorova%2C+A">A. Gligorova</a>, <a href="/search/physics?searchtype=author&query=Guatieri%2C+F">F. Guatieri</a>, <a href="/search/physics?searchtype=author&query=Hackstock%2C+P">P. Hackstock</a>, <a href="/search/physics?searchtype=author&query=Haider%2C+S">S. Haider</a>, <a href="/search/physics?searchtype=author&query=Hinterberger%2C+A">A. Hinterberger</a>, <a href="/search/physics?searchtype=author&query=Kellerbauer%2C+A">A. Kellerbauer</a>, <a href="/search/physics?searchtype=author&query=Khalidova%2C+O">O. Khalidova</a>, <a href="/search/physics?searchtype=author&query=Krasnicky%2C+D">D. Krasnicky</a>, <a href="/search/physics?searchtype=author&query=Lagomarsino%2C+V">V. Lagomarsino</a> , et al. (26 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="1904.09004v1-abstract-short" style="display: inline;"> We investigate experimentally the possibility of enhancing the production of $2^3S$ positronium atoms by driving the $1^3S$-$3^3P$ and $3^3P$-$2^3S$ transitions, overcoming the natural branching ratio limitation of spontaneous decay from $3^3P$ to $2^3S$. The decay of $3^3P$ positronium atoms towards the $2^3S$ level has been effciently stimulated by a 1312.2nm broadband IR laser pulse. The depend… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.09004v1-abstract-full').style.display = 'inline'; document.getElementById('1904.09004v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1904.09004v1-abstract-full" style="display: none;"> We investigate experimentally the possibility of enhancing the production of $2^3S$ positronium atoms by driving the $1^3S$-$3^3P$ and $3^3P$-$2^3S$ transitions, overcoming the natural branching ratio limitation of spontaneous decay from $3^3P$ to $2^3S$. The decay of $3^3P$ positronium atoms towards the $2^3S$ level has been effciently stimulated by a 1312.2nm broadband IR laser pulse. The dependence of the stimulating transition efficiency on the intensity of the IR pulse has been measured to find the optimal enhancement conditions. A maximum relative increase of $ \times (3.1 \pm 1.0) $ in the $2^3S$ production efficiency, with respect to the case where only spontaneous decay is present, was obtained. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.09004v1-abstract-full').style.display = 'none'; document.getElementById('1904.09004v1-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 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">Comments:</span> <span class="has-text-grey-dark mathjax">6 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. A 100, 063414 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1808.01808">arXiv:1808.01808</a> <span> [<a href="https://arxiv.org/pdf/1808.01808">pdf</a>, <a href="https://arxiv.org/format/1808.01808">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> </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.99.033405">10.1103/PhysRevA.99.033405 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Velocity selected production of $2^3S$ metastable positronium </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Amsler%2C+C">C. Amsler</a>, <a href="/search/physics?searchtype=author&query=Antonello%2C+M">M. Antonello</a>, <a href="/search/physics?searchtype=author&query=Belov%2C+A">A. Belov</a>, <a href="/search/physics?searchtype=author&query=Bonomi%2C+G">G. Bonomi</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Caccia%2C+M">M. Caccia</a>, <a href="/search/physics?searchtype=author&query=Camper%2C+A">A. Camper</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Comparat%2C+D">D. Comparat</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Demetrio%2C+A">A. Demetrio</a>, <a href="/search/physics?searchtype=author&query=Di+Noto%2C+L">L. Di Noto</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Fan%C3%AC%2C+M">M. Fan矛</a>, <a href="/search/physics?searchtype=author&query=Gerber%2C+S">S. Gerber</a>, <a href="/search/physics?searchtype=author&query=Gligorova%2C+A">A. Gligorova</a>, <a href="/search/physics?searchtype=author&query=Guatieri%2C+F">F. Guatieri</a>, <a href="/search/physics?searchtype=author&query=Hackstock%2C+P">P. Hackstock</a>, <a href="/search/physics?searchtype=author&query=Haider%2C+S">S. Haider</a>, <a href="/search/physics?searchtype=author&query=Hinterberger%2C+A">A. Hinterberger</a>, <a href="/search/physics?searchtype=author&query=Holmestad%2C+H">H. Holmestad</a>, <a href="/search/physics?searchtype=author&query=Kellerbauer%2C+A">A. Kellerbauer</a>, <a href="/search/physics?searchtype=author&query=Khalidova%2C+O">O. Khalidova</a> , et al. (30 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="1808.01808v2-abstract-short" style="display: inline;"> Positronium in the $2^3S$ metastable state exhibits a low electrical polarizability and a long lifetime (1140 ns) making it a promising candidate for interferometry experiments with a neutral matter-antimatter system. In the present work, $2^3S$ positronium is produced - in absence of electric field - via spontaneous radiative decay from the $3^3P$ level populated with a 205nm UV laser pulse. Than… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1808.01808v2-abstract-full').style.display = 'inline'; document.getElementById('1808.01808v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1808.01808v2-abstract-full" style="display: none;"> Positronium in the $2^3S$ metastable state exhibits a low electrical polarizability and a long lifetime (1140 ns) making it a promising candidate for interferometry experiments with a neutral matter-antimatter system. In the present work, $2^3S$ positronium is produced - in absence of electric field - via spontaneous radiative decay from the $3^3P$ level populated with a 205nm UV laser pulse. Thanks to the short temporal length of the pulse, 1.5 ns full-width at half maximum, different velocity populations of a positronium cloud emitted from a nanochannelled positron/positronium converter were selected by delaying the excitation pulse with respect to the production instant. $ 2^3S $ positronium atoms with velocity tuned between $ 7 \cdot 10^4 $ m/s and $ 10 \cdot 10^4 $ m/s were thus produced. Depending on the selected velocity, a $2^3S$ production effciency ranging from $\sim 0.8 \%$ to $\sim 1.7%$, with respect to the total amount of emitted positronium, was obtained. The observed results give a branching ratio for the $3^3P$-$2^3S$ spontaneous decay of $(9.7 \pm 2.7) \% $. The present velocity selection technique could allow to produce an almost monochromatic beam of $\sim 1 \cdot 10^3 $ $2^3S$ atoms with a velocity spread $ < 10^4 $ m/s and an angular divergence of $\sim$ 50 mrad. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1808.01808v2-abstract-full').style.display = 'none'; document.getElementById('1808.01808v2-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 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 August, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2018. </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, 3 figures, 1 table</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. A 99, 033405 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1802.07012">arXiv:1802.07012</a> <span> [<a href="https://arxiv.org/pdf/1802.07012">pdf</a>, <a href="https://arxiv.org/format/1802.07012">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> </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.98.013402">10.1103/PhysRevA.98.013402 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Producing long-lived $2^3\text{S}$ Ps via $3^3\text{P}$ laser excitation in magnetic and electric fields </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Aghion%2C+S">S. Aghion</a>, <a href="/search/physics?searchtype=author&query=Amsler%2C+C">C. Amsler</a>, <a href="/search/physics?searchtype=author&query=Antonello%2C+M">M. Antonello</a>, <a href="/search/physics?searchtype=author&query=Belov%2C+A">A. Belov</a>, <a href="/search/physics?searchtype=author&query=Bonomi%2C+G">G. Bonomi</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Caccia%2C+M">M. Caccia</a>, <a href="/search/physics?searchtype=author&query=Camper%2C+A">A. Camper</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Comparat%2C+D">D. Comparat</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Demetrio%2C+A">A. Demetrio</a>, <a href="/search/physics?searchtype=author&query=Di+Noto%2C+L">L. Di Noto</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Evans%2C+C">C. Evans</a>, <a href="/search/physics?searchtype=author&query=Fani%2C+M">M. Fani</a>, <a href="/search/physics?searchtype=author&query=Ferragut%2C+R">R. Ferragut</a>, <a href="/search/physics?searchtype=author&query=Fesel%2C+J">J. Fesel</a>, <a href="/search/physics?searchtype=author&query=Fontana%2C+A">A. Fontana</a>, <a href="/search/physics?searchtype=author&query=Gerber%2C+S">S. Gerber</a>, <a href="/search/physics?searchtype=author&query=Giammarchi%2C+M">M. Giammarchi</a>, <a href="/search/physics?searchtype=author&query=Gligorova%2C+A">A. Gligorova</a>, <a href="/search/physics?searchtype=author&query=Guatieri%2C+F">F. Guatieri</a> , et al. (40 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="1802.07012v1-abstract-short" style="display: inline;"> Producing positronium (Ps) in the metastable $2^3\text{S}$ state is of interest for various applications in fundamental physics. We report here about an experiment in which Ps atoms are produced in this long-lived state by spontaneous radiative decay of Ps excited to the $3^3\text{P}$ level manifold. The Ps cloud excitation is obtained with a UV laser pulse in an experimental vacuum chamber in pre… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.07012v1-abstract-full').style.display = 'inline'; document.getElementById('1802.07012v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1802.07012v1-abstract-full" style="display: none;"> Producing positronium (Ps) in the metastable $2^3\text{S}$ state is of interest for various applications in fundamental physics. We report here about an experiment in which Ps atoms are produced in this long-lived state by spontaneous radiative decay of Ps excited to the $3^3\text{P}$ level manifold. The Ps cloud excitation is obtained with a UV laser pulse in an experimental vacuum chamber in presence of guiding magnetic field of 25 mT and an average electric field of 300 V/cm. The indication of the $2^3\text{S}$ state production is obtained from a novel analysis technique of single-shot positronium annihilation lifetime spectra. Its production efficiency relative to the total amount of formed Ps is evaluated by fitting a simple rate equations model to the experimental data and found to be $ (2.1 \pm 1.3) \, \% $. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.07012v1-abstract-full').style.display = 'none'; document.getElementById('1802.07012v1-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 February, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. A 98, 013402 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1712.08275">arXiv:1712.08275</a> <span> [<a href="https://arxiv.org/pdf/1712.08275">pdf</a>, <a href="https://arxiv.org/ps/1712.08275">ps</a>, <a href="https://arxiv.org/format/1712.08275">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="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/10.1103/PhysRevLett.120.133205">10.1103/PhysRevLett.120.133205 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Ultracold anions for high-precision antihydrogen experiments </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Kellerbauer%2C+A">A. Kellerbauer</a>, <a href="/search/physics?searchtype=author&query=Safronova%2C+M+S">M. S. Safronova</a>, <a href="/search/physics?searchtype=author&query=Safronova%2C+U+I">U. I. Safronova</a>, <a href="/search/physics?searchtype=author&query=Yzombard%2C+P">P. Yzombard</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="1712.08275v2-abstract-short" style="display: inline;"> Experiments with antihydrogen ($\overline{\text{H}}$) for a study of matter--antimatter symmetry and antimatter gravity require ultracold $\overline{\text{H}}$ to reach ultimate precision. A promising path towards anti-atoms much colder than a few kelvin involves the pre-cooling of antiprotons by laser-cooled anions. Due to the weak binding of the valence electron in anions - dominated by polariza… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1712.08275v2-abstract-full').style.display = 'inline'; document.getElementById('1712.08275v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1712.08275v2-abstract-full" style="display: none;"> Experiments with antihydrogen ($\overline{\text{H}}$) for a study of matter--antimatter symmetry and antimatter gravity require ultracold $\overline{\text{H}}$ to reach ultimate precision. A promising path towards anti-atoms much colder than a few kelvin involves the pre-cooling of antiprotons by laser-cooled anions. Due to the weak binding of the valence electron in anions - dominated by polarization and correlation effects - only few candidate systems with suitable transitions exist. We report on a combination of experimental and theoretical studies to fully determine the relevant binding energies, transition rates and branching ratios of the most promising candidate La$^{-}$. Using combined transverse and collinear laser spectroscopy, we determined the resonant frequency of the laser cooling transition to be $谓= 96.592\,713(91)$ THz and its transition rate to be $A = 4.90(50) \times 10^{4}$ s$^{-1}$. Using a novel high-precision theoretical treatment of La$^-$ we calculated yet unmeasured energy levels, transition rates, branching ratios, and lifetimes to complement experimental information on the laser cooling cycle of La$^-$. The new data establish the suitability of La$^-$ for laser cooling and show that the cooling transition is significantly stronger than suggested by a previous theoretical study. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1712.08275v2-abstract-full').style.display = 'none'; document.getElementById('1712.08275v2-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 March, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 December, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2017. </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. Lett. 120, 133205 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1701.06306">arXiv:1701.06306</a> <span> [<a href="https://arxiv.org/pdf/1701.06306">pdf</a>, <a href="https://arxiv.org/format/1701.06306">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="Instrumentation and Detectors">physics.ins-det</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/10.1088/1748-0221/12/04/P04021">10.1088/1748-0221/12/04/P04021 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of antiproton annihilation on Cu, Ag and Au with emulsion films </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Aghion%2C+S">S. Aghion</a>, <a href="/search/physics?searchtype=author&query=Amsler%2C+C">C. Amsler</a>, <a href="/search/physics?searchtype=author&query=Ariga%2C+A">A. Ariga</a>, <a href="/search/physics?searchtype=author&query=Ariga%2C+T">T. Ariga</a>, <a href="/search/physics?searchtype=author&query=Bonomi%2C+G">G. Bonomi</a>, <a href="/search/physics?searchtype=author&query=Braunig%2C+P">P. Braunig</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Cabaret%2C+L">L. Cabaret</a>, <a href="/search/physics?searchtype=author&query=Caccia%2C+M">M. Caccia</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Comparat%2C+D">D. Comparat</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Demetrio%2C+A">A. Demetrio</a>, <a href="/search/physics?searchtype=author&query=Di+Noto%2C+L">L. Di Noto</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Ereditato%2C+A">A. Ereditato</a>, <a href="/search/physics?searchtype=author&query=Evans%2C+C">C. Evans</a>, <a href="/search/physics?searchtype=author&query=Ferragut%2C+R">R. Ferragut</a>, <a href="/search/physics?searchtype=author&query=Fesel%2C+J">J. Fesel</a>, <a href="/search/physics?searchtype=author&query=Fontana%2C+A">A. Fontana</a>, <a href="/search/physics?searchtype=author&query=Gerber%2C+S">S. Gerber</a>, <a href="/search/physics?searchtype=author&query=Giammarchi%2C+M">M. Giammarchi</a>, <a href="/search/physics?searchtype=author&query=Gligorova%2C+A">A. Gligorova</a> , et al. (47 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="1701.06306v2-abstract-short" style="display: inline;"> The characteristics of low energy antiproton annihilations on nuclei (e.g. hadronization and product multiplicities) are not well known, and Monte Carlo simulation packages that use different models provide different descriptions of the annihilation events. In this study, we measured the particle multiplicities resulting from antiproton annihilations on nuclei. The results were compared with predi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1701.06306v2-abstract-full').style.display = 'inline'; document.getElementById('1701.06306v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1701.06306v2-abstract-full" style="display: none;"> The characteristics of low energy antiproton annihilations on nuclei (e.g. hadronization and product multiplicities) are not well known, and Monte Carlo simulation packages that use different models provide different descriptions of the annihilation events. In this study, we measured the particle multiplicities resulting from antiproton annihilations on nuclei. The results were compared with predictions obtained using different models in the simulation tools GEANT4 and FLUKA. For this study, we exposed thin targets (Cu, Ag and Au) to a very low energy antiproton beam from CERN's Antiproton Decelerator, exploiting the secondary beamline available in the AEgIS experimental zone. The antiproton annihilation products were detected using emulsion films developed at the Laboratory of High Energy Physics in Bern, where they were analysed at the automatic microscope facility. The fragment multiplicity measured in this study is in good agreement with results obtained with FLUKA simulations for both minimally and heavily ionizing particles. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1701.06306v2-abstract-full').style.display = 'none'; document.getElementById('1701.06306v2-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 April, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 January, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> 2017 JINST 12 P04021 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1311.4982">arXiv:1311.4982</a> <span> [<a href="https://arxiv.org/pdf/1311.4982">pdf</a>, <a href="https://arxiv.org/format/1311.4982">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 Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Annihilation of low energy antiprotons in silicon </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Aghion%2C+S">S. Aghion</a>, <a href="/search/physics?searchtype=author&query=Ahl%C3%A9n%2C+O">O. Ahl茅n</a>, <a href="/search/physics?searchtype=author&query=Belov%2C+A+S">A. S. Belov</a>, <a href="/search/physics?searchtype=author&query=Bonomi%2C+G">G. Bonomi</a>, <a href="/search/physics?searchtype=author&query=Br%C3%A4unig%2C+P">P. Br盲unig</a>, <a href="/search/physics?searchtype=author&query=Bremer%2C+J">J. Bremer</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Burghart%2C+G">G. Burghart</a>, <a href="/search/physics?searchtype=author&query=Cabaret%2C+L">L. Cabaret</a>, <a href="/search/physics?searchtype=author&query=Caccia%2C+M">M. Caccia</a>, <a href="/search/physics?searchtype=author&query=Canali%2C+C">C. Canali</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Cialdi%2C+S">S. Cialdi</a>, <a href="/search/physics?searchtype=author&query=Comparat%2C+D">D. Comparat</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Derking%2C+J+H">J. H. Derking</a>, <a href="/search/physics?searchtype=author&query=Di+Domizio%2C+S">S. Di Domizio</a>, <a href="/search/physics?searchtype=author&query=Di+Noto%2C+L">L. Di Noto</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Dudarev%2C+A">A. Dudarev</a>, <a href="/search/physics?searchtype=author&query=Ferragut%2C+R">R. Ferragut</a>, <a href="/search/physics?searchtype=author&query=Fontana%2C+A">A. Fontana</a>, <a href="/search/physics?searchtype=author&query=Genova%2C+P">P. Genova</a> , et al. (34 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="1311.4982v2-abstract-short" style="display: inline;"> The goal of the AE$\mathrm{\bar{g}}$IS experiment at the Antiproton Decelerator (AD) at CERN, is to measure directly the Earth's gravitational acceleration on antimatter. To achieve this goal, the AE$\mathrm{\bar{g}}$IS collaboration will produce a pulsed, cold (100 mK) antihydrogen beam with a velocity of a few 100 m/s and measure the magnitude of the vertical deflection of the beam from a straig… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.4982v2-abstract-full').style.display = 'inline'; document.getElementById('1311.4982v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1311.4982v2-abstract-full" style="display: none;"> The goal of the AE$\mathrm{\bar{g}}$IS experiment at the Antiproton Decelerator (AD) at CERN, is to measure directly the Earth's gravitational acceleration on antimatter. To achieve this goal, the AE$\mathrm{\bar{g}}$IS collaboration will produce a pulsed, cold (100 mK) antihydrogen beam with a velocity of a few 100 m/s and measure the magnitude of the vertical deflection of the beam from a straight path. The final position of the falling antihydrogen will be detected by a position sensitive detector. This detector will consist of an active silicon part, where the annihilations take place, followed by an emulsion part. Together, they allow to achieve 1$%$ precision on the measurement of $\bar{g}$ with about 600 reconstructed and time tagged annihilations. We present here, to the best of our knowledge, the first direct measurement of antiproton annihilation in a segmented silicon sensor, the first step towards designing a position sensitive silicon detector for the AE$\mathrm{\bar{g}}$IS experiment. We also present a first comparison with Monte Carlo simulations (GEANT4) for antiproton energies below 5 MeV <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.4982v2-abstract-full').style.display = 'none'; document.getElementById('1311.4982v2-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 March, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 November, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2013. </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 in total, 29 figures, 3 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1306.5602">arXiv:1306.5602</a> <span> [<a href="https://arxiv.org/pdf/1306.5602">pdf</a>, <a href="https://arxiv.org/format/1306.5602">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 Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</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/10.1088/1748-0221/8/08/P08013">10.1088/1748-0221/8/08/P08013 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Prospects for measuring the gravitational free-fall of antihydrogen with emulsion detectors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=AEgIS+Collaboration"> AEgIS Collaboration</a>, <a href="/search/physics?searchtype=author&query=Aghion%2C+S">S. Aghion</a>, <a href="/search/physics?searchtype=author&query=Ahl%C3%A9n%2C+O">O. Ahl茅n</a>, <a href="/search/physics?searchtype=author&query=Amsler%2C+C">C. Amsler</a>, <a href="/search/physics?searchtype=author&query=Ariga%2C+A">A. Ariga</a>, <a href="/search/physics?searchtype=author&query=Ariga%2C+T">T. Ariga</a>, <a href="/search/physics?searchtype=author&query=Belov%2C+A+S">A. S. Belov</a>, <a href="/search/physics?searchtype=author&query=Bonomi%2C+G">G. Bonomi</a>, <a href="/search/physics?searchtype=author&query=Br%C3%A4unig%2C+P">P. Br盲unig</a>, <a href="/search/physics?searchtype=author&query=Bremer%2C+J">J. Bremer</a>, <a href="/search/physics?searchtype=author&query=Brusa%2C+R+S">R. S. Brusa</a>, <a href="/search/physics?searchtype=author&query=Cabaret%2C+L">L. Cabaret</a>, <a href="/search/physics?searchtype=author&query=Canali%2C+C">C. Canali</a>, <a href="/search/physics?searchtype=author&query=Caravita%2C+R">R. Caravita</a>, <a href="/search/physics?searchtype=author&query=Castelli%2C+F">F. Castelli</a>, <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">G. Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Cialdi%2C+S">S. Cialdi</a>, <a href="/search/physics?searchtype=author&query=Comparat%2C+D">D. Comparat</a>, <a href="/search/physics?searchtype=author&query=Consolati%2C+G">G. Consolati</a>, <a href="/search/physics?searchtype=author&query=Derking%2C+J+H">J. H. Derking</a>, <a href="/search/physics?searchtype=author&query=Di+Domizio%2C+S">S. Di Domizio</a>, <a href="/search/physics?searchtype=author&query=Di+Noto%2C+L">L. Di Noto</a>, <a href="/search/physics?searchtype=author&query=Doser%2C+M">M. Doser</a>, <a href="/search/physics?searchtype=author&query=Dudarev%2C+A">A. Dudarev</a>, <a href="/search/physics?searchtype=author&query=Ereditato%2C+A">A. Ereditato</a> , et al. (46 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="1306.5602v1-abstract-short" style="display: inline;"> The main goal of the AEgIS experiment at CERN is to test the weak equivalence principle for antimatter. AEgIS will measure the free-fall of an antihydrogen beam traversing a moir茅 deflectometer. The goal is to determine the gravitational acceleration g for antihydrogen with an initial relative accuracy of 1% by using an emulsion detector combined with a silicon micro-strip detector to measure the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1306.5602v1-abstract-full').style.display = 'inline'; document.getElementById('1306.5602v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1306.5602v1-abstract-full" style="display: none;"> The main goal of the AEgIS experiment at CERN is to test the weak equivalence principle for antimatter. AEgIS will measure the free-fall of an antihydrogen beam traversing a moir茅 deflectometer. The goal is to determine the gravitational acceleration g for antihydrogen with an initial relative accuracy of 1% by using an emulsion detector combined with a silicon micro-strip detector to measure the time of flight. Nuclear emulsions can measure the annihilation vertex of antihydrogen atoms with a precision of about 1 - 2 microns r.m.s. We present here results for emulsion detectors operated in vacuum using low energy antiprotons from the CERN antiproton decelerator. We compare with Monte Carlo simulations, and discuss the impact on the AEgIS project. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1306.5602v1-abstract-full').style.display = 'none'; document.getElementById('1306.5602v1-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 June, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2013. </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">20 pages, 16 figures, 3 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1209.3362">arXiv:1209.3362</a> <span> [<a href="https://arxiv.org/pdf/1209.3362">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Data Analysis, Statistics and Probability">physics.data-an</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Soft Condensed Matter">cond-mat.soft</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/10.1063/1.4755747">10.1063/1.4755747 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Quasi-real-time analysis of dynamic near field scattering data using a graphics processing unit </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Cerchiari%2C+G">Giovanni Cerchiari</a>, <a href="/search/physics?searchtype=author&query=Croccolo%2C+F">Fabrizio Croccolo</a>, <a href="/search/physics?searchtype=author&query=Cardinaux%2C+F">Fr茅d茅ric Cardinaux</a>, <a href="/search/physics?searchtype=author&query=Scheffold%2C+F">Frank Scheffold</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="1209.3362v1-abstract-short" style="display: inline;"> We present an implementation of the analysis of dynamic near field scattering (NFS) data using a graphics processing unit (GPU). We introduce an optimized data management scheme thereby limiting the number of operations required. Overall, we reduce the processing time from hours to minutes, for typical experimental conditions. Previously the limiting step in such experiments, the processing time i… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1209.3362v1-abstract-full').style.display = 'inline'; document.getElementById('1209.3362v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1209.3362v1-abstract-full" style="display: none;"> We present an implementation of the analysis of dynamic near field scattering (NFS) data using a graphics processing unit (GPU). We introduce an optimized data management scheme thereby limiting the number of operations required. Overall, we reduce the processing time from hours to minutes, for typical experimental conditions. Previously the limiting step in such experiments, the processing time is now comparable to the data acquisition time. Our approach is applicable to various dynamic NFS methods, including shadowgraph, Schlieren and differential dynamic microscopy. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1209.3362v1-abstract-full').style.display = 'none'; document.getElementById('1209.3362v1-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> 15 September, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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 Review of Scientific Instruments (Note), supplementary material not included</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Rev. Sci. Instrum. 83, 106101 (2012) </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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