Search | arXiv e-print repository

<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"/> <meta name="viewport" content="width=device-width, initial-scale=1"/>  <link rel="apple-touch-icon" sizes="180x180" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/apple-touch-icon.png"> <link rel="icon" type="image/png" sizes="32x32" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/favicon-32x32.png"> <link rel="icon" type="image/png" sizes="16x16" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/favicon-16x16.png"> <link rel="manifest" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/site.webmanifest"> <link rel="mask-icon" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/safari-pinned-tab.svg" color="#b31b1b"> <link rel="shortcut icon" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/favicon.ico"> <meta name="msapplication-TileColor" content="#b31b1b"> <meta name="msapplication-config" content="images/icons/browserconfig.xml"> <meta name="theme-color" content="#b31b1b">  <title>Search | arXiv e-print repository</title> <script defer src="https://static.arxiv.org/static/base/1.0.0a5/fontawesome-free-5.11.2-web/js/all.js"></script> <link rel="stylesheet" href="https://static.arxiv.org/static/base/1.0.0a5/css/arxivstyle.css" /> <script type="text/x-mathjax-config"> MathJax.Hub.Config({ messageStyle: "none", extensions: ["tex2jax.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [ ['$','$'], ["\$","\$"] ], displayMath: [ ['$$','$$'], ["\\[","\\]"] ], processEscapes: true, ignoreClass: '.*', processClass: 'mathjax.*' }, TeX: { extensions: ["AMSmath.js", "AMSsymbols.js", "noErrors.js"], noErrors: { inlineDelimiters: ["$","$"], multiLine: false, style: { "font-size": "normal", "border": "" } } }, "HTML-CSS": { availableFonts: ["TeX"] } }); </script> <script src='//static.arxiv.org/MathJax-2.7.3/MathJax.js'></script> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/notification.js"></script> <link rel="stylesheet" href="https://static.arxiv.org/static/search/0.5.6/css/bulma-tooltip.min.css" /> <link rel="stylesheet" href="https://static.arxiv.org/static/search/0.5.6/css/search.css" /> <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha256-k2WSCIexGzOj3Euiig+TlR8gA0EmPjuc79OEeY5L45g=" crossorigin="anonymous"></script> <script src="https://static.arxiv.org/static/search/0.5.6/js/fieldset.js"></script> <style> radio#cf-customfield_11400 { display: none; } </style> </head> <body> <header><a href="#main-container" class="is-sr-only">Skip to main content</a>  <div class="attribution level is-marginless" role="banner"> <div class="level-left"> <a class="level-item" href="https://cornell.edu/"><img src="https://static.arxiv.org/static/base/1.0.0a5/images/cornell-reduced-white-SMALL.svg" alt="Cornell University" width="200" aria-label="logo" /></a> </div> <div class="level-right is-marginless"><p class="sponsors level-item is-marginless"><span id="support-ack-url">We gratefully acknowledge support from<br /> the Simons Foundation, <a href="https://info.arxiv.org/about/ourmembers.html">member institutions</a>, and all contributors. <a href="https://info.arxiv.org/about/donate.html">Donate</a></span></p></div> </div>  <div class="identity level is-marginless"> <div class="level-left"> <div class="level-item"> <a class="arxiv" href="https://arxiv.org/" aria-label="arxiv-logo"> <img src="https://static.arxiv.org/static/base/1.0.0a5/images/arxiv-logo-one-color-white.svg" aria-label="logo" alt="arxiv logo" width="85" style="width:85px;"/> </a> </div> </div> <div class="search-block level-right"> <form class="level-item mini-search" method="GET" action="https://arxiv.org/search"> <div class="field has-addons"> <div class="control"> <input class="input is-small" type="text" name="query" placeholder="Search..." aria-label="Search term or terms" /> <p class="help"><a href="https://info.arxiv.org/help">Help</a> | <a href="https://arxiv.org/search/advanced">Advanced Search</a></p> </div> <div class="control"> <div class="select is-small"> <select name="searchtype" aria-label="Field to search"> <option value="all" selected="selected">All fields</option> <option value="title">Title</option> <option value="author">Author</option> <option value="abstract">Abstract</option> <option value="comments">Comments</option> <option value="journal_ref">Journal reference</option> <option value="acm_class">ACM classification</option> <option value="msc_class">MSC classification</option> <option value="report_num">Report number</option> <option value="paper_id">arXiv identifier</option> <option value="doi">DOI</option> <option value="orcid">ORCID</option> <option value="author_id">arXiv author ID</option> <option value="help">Help pages</option> <option value="full_text">Full text</option> </select> </div> </div> <input type="hidden" name="source" value="header"> <button class="button is-small is-cul-darker">Search</button> </div> </form> </div> </div>  <div class="container"> <div class="user-tools is-size-7 has-text-right has-text-weight-bold" role="navigation" aria-label="User menu"> <a href="https://arxiv.org/login">Login</a> </div> </div> </header> <main class="container" id="main-container"> <div class="level is-marginless"> <div class="level-left"> <h1 class="title is-clearfix"> Showing 1–50 of 75 results for author: <span class="mathjax">Du, L</span> </h1> </div> <div class="level-right is-hidden-mobile">  <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> <div class="content"> <form method="GET" action="/search/physics" aria-role="search"> Searching in archive <strong>physics</strong>. <a href="/search/?searchtype=author&query=Du%2C+L">Search in all archives.</a> <div class="field has-addons-tablet"> <div class="control is-expanded"> <label for="query" class="hidden-label">Search term or terms</label> <input class="input is-medium" id="query" name="query" placeholder="Search term..." type="text" value="Du, L"> </div> <div class="select control is-medium"> <label class="is-hidden" for="searchtype">Field</label> <select class="is-medium" id="searchtype" name="searchtype"><option value="all">All fields</option><option value="title">Title</option><option selected value="author">Author(s)</option><option value="abstract">Abstract</option><option value="comments">Comments</option><option value="journal_ref">Journal reference</option><option value="acm_class">ACM classification</option><option value="msc_class">MSC classification</option><option value="report_num">Report number</option><option value="paper_id">arXiv identifier</option><option value="doi">DOI</option><option value="orcid">ORCID</option><option value="license">License (URI)</option><option value="author_id">arXiv author ID</option><option value="help">Help pages</option><option value="full_text">Full text</option></select> </div> <div class="control"> <button class="button is-link is-medium">Search</button> </div> </div> <div class="field"> <div class="control is-size-7"> <label class="radio"> <input checked id="abstracts-0" name="abstracts" type="radio" value="show"> Show abstracts </label> <label class="radio"> <input id="abstracts-1" name="abstracts" type="radio" value="hide"> Hide abstracts </label> </div> </div> <div class="is-clearfix" style="height: 2.5em"> <div class="is-pulled-right"> <a href="/search/advanced?terms-0-term=Du%2C+L&terms-0-field=author&size=50&order=-announced_date_first">Advanced Search</a> </div> </div> <input type="hidden" name="order" value="-announced_date_first"> <input type="hidden" name="size" value="50"> </form> <div class="level breathe-horizontal"> <div class="level-left"> <form method="GET" action="/search/"> <div style="display: none;"> <select id="searchtype" name="searchtype"><option value="all">All fields</option><option value="title">Title</option><option selected value="author">Author(s)</option><option value="abstract">Abstract</option><option value="comments">Comments</option><option value="journal_ref">Journal reference</option><option value="acm_class">ACM classification</option><option value="msc_class">MSC classification</option><option value="report_num">Report number</option><option value="paper_id">arXiv identifier</option><option value="doi">DOI</option><option value="orcid">ORCID</option><option value="license">License (URI)</option><option value="author_id">arXiv author ID</option><option value="help">Help pages</option><option value="full_text">Full text</option></select> <input id="query" name="query" type="text" value="Du, L"> <ul id="abstracts"><li><input checked id="abstracts-0" name="abstracts" type="radio" value="show"> <label for="abstracts-0">Show abstracts</label></li><li><input id="abstracts-1" name="abstracts" type="radio" value="hide"> <label for="abstracts-1">Hide abstracts</label></li></ul> </div> <div class="box field is-grouped is-grouped-multiline level-item"> <div class="control"> <span class="select is-small"> <select id="size" name="size"><option value="25">25</option><option selected value="50">50</option><option value="100">100</option><option value="200">200</option></select> </span> <label for="size">results per page</label>. </div> <div class="control"> <label for="order">Sort results by</label> <span class="select is-small"> <select id="order" name="order"><option selected value="-announced_date_first">Announcement date (newest first)</option><option value="announced_date_first">Announcement date (oldest first)</option><option value="-submitted_date">Submission date (newest first)</option><option value="submitted_date">Submission date (oldest first)</option><option value="">Relevance</option></select> </span> </div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <nav class="pagination is-small is-centered breathe-horizontal" role="navigation" aria-label="pagination"> <a href="" class="pagination-previous is-invisible">Previous </a> <a href="/search/?searchtype=author&query=Du%2C+L&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Du%2C+L&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Du%2C+L&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> </ul> </nav> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2502.14181">arXiv:2502.14181</a> <span> [<a href="https://arxiv.org/pdf/2502.14181">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> </div> </div> <p class="title is-5 mathjax"> Ultrathin Ga$_2$O$_3$ Tunneling Contact for 2D Transition-metal Dichalcogenides Transistor </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Li%2C+Y">Yun Li</a>, <a href="/search/physics?searchtype=author&query=Yun%2C+T">Tinghe Yun</a>, <a href="/search/physics?searchtype=author&query=Wei%2C+B">Bohan Wei</a>, <a href="/search/physics?searchtype=author&query=Mu%2C+H">Haoran Mu</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Luojun Du</a>, <a href="/search/physics?searchtype=author&query=Cui%2C+N">Nan Cui</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+G">Guangyu Zhang</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+S">Shenghuang Lin</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="2502.14181v1-abstract-short" style="display: inline;"> The development of two-dimensional (2D) transition metal dichalcogenides (TMDs) based transistors has been constrained by high contact resistance and inadequate current delivery, primarily stemming from metal-induced gap states and Fermi level pinning. Research into addressing these challenges is essential for the advancing 2D transistors from laboratory experiments to industrial-grade production.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.14181v1-abstract-full').style.display = 'inline'; document.getElementById('2502.14181v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.14181v1-abstract-full" style="display: none;"> The development of two-dimensional (2D) transition metal dichalcogenides (TMDs) based transistors has been constrained by high contact resistance and inadequate current delivery, primarily stemming from metal-induced gap states and Fermi level pinning. Research into addressing these challenges is essential for the advancing 2D transistors from laboratory experiments to industrial-grade production. In this work, we present amorphous Ga$_2$O$_3$ as a novel tunneling contact layer for multilayer WS2-based field-effect transistors (FETs) to enhance electrical performance. The addition of this innovative tunneling layer avoid Schottky barrier forming while finally change into a tunneling barrier with the barrier height to just 3.7 meV, near-ideal ohmic contacts. This approach effectively reduces contact resistance to only 2.38 k$惟\,渭$m and specific contact resistivity as low as $3 \times 10^{-5}$ $惟$cm$^2$. A record-high electron mobility of 296 cm$^2$ V$^{-1}$ s$^{-1}$ and ON-OFF ratio over 106 are realized for WS$_2$ transistor at room temperature. Compared to other tunneling materials, ultrathin Ga$_2$O$_3$ layer offers scalability, cost-efficient production and broad substrate compatibility, making it well-suited for seamless integration with industrial wafer-scale electronics. A robust device performance remains highly consistent in a large-scale transistor array fabricated on $1.5\times 1.5$ cm$^2$ chips, with the average mobility closing to 200 cm$^2$ V$^{-1}$ s$^{-1}$. These findings establish a new benchmark for contact performance in 2D transistors and prove the potential of tunneling contact engineering in advancing high-performance, scalable 29 pelectronics with promising applications in quantum computing and communication. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.14181v1-abstract-full').style.display = 'none'; document.getElementById('2502.14181v1-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 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">29 pages, 5figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2410.17069">arXiv:2410.17069</a> <span> [<a href="https://arxiv.org/pdf/2410.17069">pdf</a>, <a href="https://arxiv.org/format/2410.17069">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</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="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Engineering Fault-tolerant Bosonic Codes with Quantum Lattice Gates </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Guo%2C+L">Lingzhen Guo</a>, <a href="/search/physics?searchtype=author&query=Huang%2C+T">Tangyou Huang</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Lei Du</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2410.17069v2-abstract-short" style="display: inline;"> Bosonic codes offer a hardware-efficient approach to encoding and protecting quantum information with a single continuous-variable bosonic system. In this paper, we introduce a new universal quantum gate set composed of only one type of gate element, which we call the quantum lattice gate, to engineer bosonic code states for fault-tolerant quantum computing. We develop a systematic framework for c… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2410.17069v2-abstract-full').style.display = 'inline'; document.getElementById('2410.17069v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2410.17069v2-abstract-full" style="display: none;"> Bosonic codes offer a hardware-efficient approach to encoding and protecting quantum information with a single continuous-variable bosonic system. In this paper, we introduce a new universal quantum gate set composed of only one type of gate element, which we call the quantum lattice gate, to engineer bosonic code states for fault-tolerant quantum computing. We develop a systematic framework for code state engineering based on the Floquet Hamiltonian engineering, where the target Hamiltonian is constructed directly from the given target state(s). We apply our method to three basic code state engineering processes, including single code state preparation, code space embedding and code space transformation. Furthermore, we explore the application of our method to automatic quantum error correction against single-photon loss with four-legged cat codes. Our proposal is particularly well-suited for superconducting circuit architectures with Josephson junctions, where the full nonlinearity of Josephson junction potential is harnessed as a quantum resource and the quantum lattice gate can be implemented on a sub-nanosecond timescale. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2410.17069v2-abstract-full').style.display = 'none'; document.getElementById('2410.17069v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 October, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">24 pages, 10 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2410.15382">arXiv:2410.15382</a> <span> [<a href="https://arxiv.org/pdf/2410.15382">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</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="Chemical Physics">physics.chem-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acsami.3c00558">10.1021/acsami.3c00558 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The twisting dynamics of large lattice mismatch van der Waals heterostructures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Liao%2C+M">Mengzhou Liao</a>, <a href="/search/physics?searchtype=author&query=Silva%2C+A">Andrea Silva</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Luojun Du</a>, <a href="/search/physics?searchtype=author&query=Nicolini%2C+P">Paolo Nicolini</a>, <a href="/search/physics?searchtype=author&query=Claerbout%2C+V+E+P">Victor E. P. Claerbout</a>, <a href="/search/physics?searchtype=author&query=Kramer%2C+D">Denis Kramer</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+R">Rong Yang</a>, <a href="/search/physics?searchtype=author&query=Shi%2C+D">Dongxia Shi</a>, <a href="/search/physics?searchtype=author&query=Polcar%2C+T">Tomas Polcar</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+G">Guangyu Zhang</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2410.15382v1-abstract-short" style="display: inline;"> Van der Waals (vdW) homo-/hetero-structures are ideal systems for studying interfacial tribological properties such as structural superlubricity. Previous studies concentrated on the mechanism of translational motion in vdW interfaces. However, detailed mechanisms and general properties of the rotational motion are barely explored. Here, we combine experiments and simulations to reveal the twistin… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2410.15382v1-abstract-full').style.display = 'inline'; document.getElementById('2410.15382v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2410.15382v1-abstract-full" style="display: none;"> Van der Waals (vdW) homo-/hetero-structures are ideal systems for studying interfacial tribological properties such as structural superlubricity. Previous studies concentrated on the mechanism of translational motion in vdW interfaces. However, detailed mechanisms and general properties of the rotational motion are barely explored. Here, we combine experiments and simulations to reveal the twisting dynamics of the MoS$_2$/graphite heterostructure. Unlike the translational friction falling into the superlubricity regime with no twist angle dependence, the dynamic rotational resistances highly depend on twist angles. Our results show that the periodic rotational resistance force originates from structural potential energy changes during the twisting. The structural potential energy of MoS$_2$/graphite heterostructure increases monotonically from0 to 30 degrees twist angles, and the estimated relative energy barrier is (1.43 +/- 0.36) x 10 J/m. The formation of Moir茅 superstructures in the graphene layer is the key to controlling the structural potential energy of the MoS$_2$/graphene heterostructure. Our results suggest that in twisting 2D heterostructures, even if the interface sliding friction is negligible, the evolving potential energy change results in a non-vanishing rotational resistance force. The structural change of the heterostructure can be an additional pathway for energy dissipation in the rotational motion, further enhancing the rotational friction force. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2410.15382v1-abstract-full').style.display = 'none'; document.getElementById('2410.15382v1-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 October, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Published in ACS Appl. Mater. Interfaces 2023, 15, 15, 19616-19623</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2410.12233">arXiv:2410.12233</a> <span> [<a href="https://arxiv.org/pdf/2410.12233">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Physically interpretable diffractive optical networks </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Wu%2C+R">Ruitao Wu</a>, <a href="/search/physics?searchtype=author&query=Fang%2C+J">Juncheng Fang</a>, <a href="/search/physics?searchtype=author&query=Pan%2C+R">Rui Pan</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+R">Rongyi Lin</a>, <a href="/search/physics?searchtype=author&query=Li%2C+K">Kaiyuan Li</a>, <a href="/search/physics?searchtype=author&query=Lei%2C+T">Ting Lei</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Luping Du</a>, <a href="/search/physics?searchtype=author&query=Yuan%2C+X">Xiaocong Yuan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2410.12233v2-abstract-short" style="display: inline;"> Inspired by neural network algorithms in deep learning, diffractive optical networks have arisen as new platforms for manipulating light-matter interactions. Inherited from the deep learning black box nature, clear physical meanings have never been given for these complex diffractive networks at the layer level, even though the systems are visible in physical space. Using exemplified mode conversi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2410.12233v2-abstract-full').style.display = 'inline'; document.getElementById('2410.12233v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2410.12233v2-abstract-full" style="display: none;"> Inspired by neural network algorithms in deep learning, diffractive optical networks have arisen as new platforms for manipulating light-matter interactions. Inherited from the deep learning black box nature, clear physical meanings have never been given for these complex diffractive networks at the layer level, even though the systems are visible in physical space. Using exemplified mode conversion systems, we show how various physical transformation rules within diffractive networks can be unveiled given properly defined input/output mode relations. Surprising physical transformation division phenomenon and an optical analogy of gradientvanishing-effect have been observed and discussed for high-dimensional mode sorting tasks. The use of physical interpretation for efficiently designing a parameter-varying network has also been demonstrated. These physically interpretable optical networks resolve the contradiction between rigorous physical theorem and operationally vague network structure, and pave the way for further interpret advanced deep learning tasks and other physical neural networks. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2410.12233v2-abstract-full').style.display = 'none'; document.getElementById('2410.12233v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 October, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.09037">arXiv:2407.09037</a> <span> [<a href="https://arxiv.org/pdf/2407.09037">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Photonic quasicrystal of spin angular momentum </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Lin%2C+M">Min Lin</a>, <a href="/search/physics?searchtype=author&query=Gou%2C+X">Xinxin Gou</a>, <a href="/search/physics?searchtype=author&query=Xie%2C+Z">Zhenwei Xie</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+A">Aiping Yang</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Luping Du</a>, <a href="/search/physics?searchtype=author&query=Yuan%2C+X">Xiaocong Yuan</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="2407.09037v1-abstract-short" style="display: inline;"> Quasicrystals,characterized by long-range order without translational symmetry,have catalyzed transformative advances in various fields,including optics in terms of field quasicrystals.Here,we present the first demonstration of photonic quasicrystals formed by spin angular momentum, unveiling novel spin-orbit coupling effects absent in traditional field quasicrystals.A de Bruijn tiling like theore… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.09037v1-abstract-full').style.display = 'inline'; document.getElementById('2407.09037v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.09037v1-abstract-full" style="display: none;"> Quasicrystals,characterized by long-range order without translational symmetry,have catalyzed transformative advances in various fields,including optics in terms of field quasicrystals.Here,we present the first demonstration of photonic quasicrystals formed by spin angular momentum, unveiling novel spin-orbit coupling effects absent in traditional field quasicrystals.A de Bruijn tiling like theoretical framework was built elucidating the formation mechanism of spin quasicrystals for diverse symmetries.Moreover,the configurations of these spin textures can be manipulated through the adjustments of the wavefronts,among which phason-like discontinuous dynamics is observed and quantitatively measured. Unlike optical quasicrystals shaped by electromagnetic fields,these spin-governed quasicrystals exhibit quasi-periodic properties of kinematic parameters,extending their potential applications to other physical systems. These findings hold promise for novel advancements in optical trapping,quasicrystal fabrication,and optical encryption systems. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.09037v1-abstract-full').style.display = 'none'; document.getElementById('2407.09037v1-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> 12 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.06063">arXiv:2406.06063</a> <span> [<a href="https://arxiv.org/pdf/2406.06063">pdf</a>, <a href="https://arxiv.org/format/2406.06063">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Enabling Large-Scale and High-Precision Fluid Simulations on Near-Term Quantum Computers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Chen%2C+Z">Zhao-Yun Chen</a>, <a href="/search/physics?searchtype=author&query=Ma%2C+T">Teng-Yang Ma</a>, <a href="/search/physics?searchtype=author&query=Ye%2C+C">Chuang-Chao Ye</a>, <a href="/search/physics?searchtype=author&query=Xu%2C+L">Liang Xu</a>, <a href="/search/physics?searchtype=author&query=Tan%2C+M">Ming-Yang Tan</a>, <a href="/search/physics?searchtype=author&query=Zhuang%2C+X">Xi-Ning Zhuang</a>, <a href="/search/physics?searchtype=author&query=Xu%2C+X">Xiao-Fan Xu</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+Y">Yun-Jie Wang</a>, <a href="/search/physics?searchtype=author&query=Sun%2C+T">Tai-Ping Sun</a>, <a href="/search/physics?searchtype=author&query=Chen%2C+Y">Yong Chen</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Lei Du</a>, <a href="/search/physics?searchtype=author&query=Guo%2C+L">Liang-Liang Guo</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+H">Hai-Feng Zhang</a>, <a href="/search/physics?searchtype=author&query=Tao%2C+H">Hao-Ran Tao</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+T">Tian-Le Wang</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+X">Xiao-Yan Yang</a>, <a href="/search/physics?searchtype=author&query=Zhao%2C+Z">Ze-An Zhao</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+P">Peng Wang</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+S">Sheng Zhang</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+C">Chi Zhang</a>, <a href="/search/physics?searchtype=author&query=Zhao%2C+R">Ren-Ze Zhao</a>, <a href="/search/physics?searchtype=author&query=Jia%2C+Z">Zhi-Long Jia</a>, <a href="/search/physics?searchtype=author&query=Kong%2C+W">Wei-Cheng Kong</a>, <a href="/search/physics?searchtype=author&query=Dou%2C+M">Meng-Han Dou</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+J">Jun-Chao Wang</a> , et al. (7 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="2406.06063v3-abstract-short" style="display: inline;"> Quantum computational fluid dynamics (QCFD) offers a promising alternative to classical computational fluid dynamics (CFD) by leveraging quantum algorithms for higher efficiency. This paper introduces a comprehensive QCFD method, including an iterative method "Iterative-QLS" that suppresses error in quantum linear solver, and a subspace method to scale the solution to a larger size. We implement o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.06063v3-abstract-full').style.display = 'inline'; document.getElementById('2406.06063v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.06063v3-abstract-full" style="display: none;"> Quantum computational fluid dynamics (QCFD) offers a promising alternative to classical computational fluid dynamics (CFD) by leveraging quantum algorithms for higher efficiency. This paper introduces a comprehensive QCFD method, including an iterative method "Iterative-QLS" that suppresses error in quantum linear solver, and a subspace method to scale the solution to a larger size. We implement our method on a superconducting quantum computer, demonstrating successful simulations of steady Poiseuille flow and unsteady acoustic wave propagation. The Poiseuille flow simulation achieved a relative error of less than $0.2\%$, and the unsteady acoustic wave simulation solved a 5043-dimensional matrix. We emphasize the utilization of the quantum-classical hybrid approach in applications of near-term quantum computers. By adapting to quantum hardware constraints and offering scalable solutions for large-scale CFD problems, our method paves the way for practical applications of near-term quantum computers in computational science. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.06063v3-abstract-full').style.display = 'none'; document.getElementById('2406.06063v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 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">31 pages, 10 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/2401.12545">arXiv:2401.12545</a> <span> [<a href="https://arxiv.org/pdf/2401.12545">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link 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="Superconductivity">cond-mat.supr-con</span> </div> </div> <p class="title is-5 mathjax"> Ultra-broadband near-field Josephson microwave microscopy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Zhang%2C+P">Ping Zhang</a>, <a href="/search/physics?searchtype=author&query=Lyu%2C+Y">Yang-Yang Lyu</a>, <a href="/search/physics?searchtype=author&query=Lv%2C+J">Jingjing Lv</a>, <a href="/search/physics?searchtype=author&query=Wei%2C+Z">Zihan Wei</a>, <a href="/search/physics?searchtype=author&query=Chen%2C+S">Shixian Chen</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+C">Chenguang Wang</a>, <a href="/search/physics?searchtype=author&query=Du%2C+H">Hongmei Du</a>, <a href="/search/physics?searchtype=author&query=Li%2C+D">Dingding Li</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+Z">Zixi Wang</a>, <a href="/search/physics?searchtype=author&query=Hou%2C+S">Shoucheng Hou</a>, <a href="/search/physics?searchtype=author&query=Su%2C+R">Runfeng Su</a>, <a href="/search/physics?searchtype=author&query=Sun%2C+H">Hancong Sun</a>, <a href="/search/physics?searchtype=author&query=Du%2C+Y">Yuan Du</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Li Du</a>, <a href="/search/physics?searchtype=author&query=Gao%2C+L">Liming Gao</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+Y">Yong-Lei Wang</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+H">Huabing Wang</a>, <a href="/search/physics?searchtype=author&query=Wu%2C+P">Peiheng Wu</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="2401.12545v1-abstract-short" style="display: inline;"> Advanced microwave technologies constitute the foundation of a wide range of modern sciences, including quantum computing, microwave photonics, spintronics, etc. To facilitate the design of chip-based microwave devices, there is an increasing demand for state-of-the-art microscopic techniques capable of characterizing the near-field microwave distribution and performance. In this work, we integrat… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.12545v1-abstract-full').style.display = 'inline'; document.getElementById('2401.12545v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2401.12545v1-abstract-full" style="display: none;"> Advanced microwave technologies constitute the foundation of a wide range of modern sciences, including quantum computing, microwave photonics, spintronics, etc. To facilitate the design of chip-based microwave devices, there is an increasing demand for state-of-the-art microscopic techniques capable of characterizing the near-field microwave distribution and performance. In this work, we integrate Josephson junctions onto a nano-sized quartz tip, forming a highly sensitive microwave mixer on-tip. This allows us to conduct spectroscopic imaging of near-field microwave distributions with high spatial resolution. Leveraging its microwave-sensitive characteristics, our Josephson microscope achieves a broad detecting bandwidth of up to 200 GHz with remarkable frequency and intensity sensitivities. Our work emphasizes the benefits of utilizing the Josephson microscope as a real-time, non-destructive technique to advance integrated microwave electronics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.12545v1-abstract-full').style.display = 'none'; document.getElementById('2401.12545v1-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 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2401.00032">arXiv:2401.00032</a> <span> [<a href="https://arxiv.org/pdf/2401.00032">pdf</a>, <a href="https://arxiv.org/format/2401.00032">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> </div> </div> <p class="title is-5 mathjax"> Bayesian Recursive Information Optical Imaging: A Ghost Imaging Scheme Based on Bayesian Filtering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Du%2C+L">Long-Kun Du</a>, <a href="/search/physics?searchtype=author&query=Hu%2C+C">Chenyu Hu</a>, <a href="/search/physics?searchtype=author&query=Liu%2C+S">Shuang Liu</a>, <a href="/search/physics?searchtype=author&query=Deng%2C+C">Chenjin Deng</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+C">Chaoran Wang</a>, <a href="/search/physics?searchtype=author&query=Bo%2C+Z">Zunwang Bo</a>, <a href="/search/physics?searchtype=author&query=Chen%2C+M">Mingliang Chen</a>, <a href="/search/physics?searchtype=author&query=Liu%2C+W">Wei-Tao Liu</a>, <a href="/search/physics?searchtype=author&query=Han%2C+S">Shensheng Han</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="2401.00032v1-abstract-short" style="display: inline;"> Computational imaging~(CI) has been attracting a lot of interest in recent years for its superiority over traditional imaging in various applications. In CI systems, information is generally acquired in an encoded form and subsequently decoded via processing algorithms, which is quite in line with the information transmission mode of modern communication, and leads to emerging studies from the vie… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.00032v1-abstract-full').style.display = 'inline'; document.getElementById('2401.00032v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2401.00032v1-abstract-full" style="display: none;"> Computational imaging~(CI) has been attracting a lot of interest in recent years for its superiority over traditional imaging in various applications. In CI systems, information is generally acquired in an encoded form and subsequently decoded via processing algorithms, which is quite in line with the information transmission mode of modern communication, and leads to emerging studies from the viewpoint of information optical imaging. Currently, one of the most important issues to be theoretically studied for CI is to quantitatively evaluate the fundamental ability of information acquisition, which is essential for both objective performance assessment and efficient design of imaging system. In this paper, by incorporating the Bayesian filtering paradigm, we propose a framework for CI that enables quantitative evaluation and design of the imaging system, and demonstate it based on ghost imaging. In specific, this framework can provide a quantitative evaluation on the acquired information through Fisher information and Cram茅r-Rao Lower Bound (CRLB), and the intrinsic performance of the imaging system can be accessed in real-time. With simulation and experiments, the framework is validated and compared with existing linear unbiased algorithms. In particular, the image retrieval can reach the CRLB. Furthermore, information-driven adaptive design for optimizing the information acquisition procedure is also achieved. By quantitative describing and efficient designing, the proposed framework is expected to promote the practical applications of CI techniques. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.00032v1-abstract-full').style.display = 'none'; document.getElementById('2401.00032v1-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 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2401.00018">arXiv:2401.00018</a> <span> [<a href="https://arxiv.org/pdf/2401.00018">pdf</a>, <a href="https://arxiv.org/format/2401.00018">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 - Lattice">hep-lat</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> </div> <p class="title is-5 mathjax"> Combining Bayesian reconstruction entropy with maximum entropy method for analytic continuations of matrix-valued Green's functions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Yang%2C+S">Songlin Yang</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Liang Du</a>, <a href="/search/physics?searchtype=author&query=Huang%2C+L">Li Huang</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="2401.00018v1-abstract-short" style="display: inline;"> The Bayesian reconstruction entropy is considered an alternative to the Shannon-Jaynes entropy, as it does not exhibit the asymptotic flatness characteristic of the Shannon-Jaynes entropy and obeys the scale invariance. It is commonly utilized in conjunction with the maximum entropy method to derive spectral functions from Euclidean time correlators produced by lattice QCD simulations. This study… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.00018v1-abstract-full').style.display = 'inline'; document.getElementById('2401.00018v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2401.00018v1-abstract-full" style="display: none;"> The Bayesian reconstruction entropy is considered an alternative to the Shannon-Jaynes entropy, as it does not exhibit the asymptotic flatness characteristic of the Shannon-Jaynes entropy and obeys the scale invariance. It is commonly utilized in conjunction with the maximum entropy method to derive spectral functions from Euclidean time correlators produced by lattice QCD simulations. This study expands the application of the Bayesian reconstruction entropy to the reconstruction of spectral functions for Matsubara or imaginary-time Green's functions in quantum many-body physics. Furthermore, it extends the Bayesian reconstruction entropy to implement the positive-negative entropy algorithm, enabling the analytic continuations of matrix-valued Green's functions on an element-wise manner. Both the diagonal and off-diagonal components of the matrix-valued Green's functions are treated equally. Benchmark results for the analytic continuations of synthetic Green's functions indicate that the Bayesian reconstruction entropy, when combined with the preblur trick, demonstrates comparable performance to the Shannon-Jaynes entropy. Notably, it exhibits greater resilience to noises in the input data, particularly when the noise level is moderate. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.00018v1-abstract-full').style.display = 'none'; document.getElementById('2401.00018v1-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> 26 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">17 pages, 7 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2310.00590">arXiv:2310.00590</a> <span> [<a href="https://arxiv.org/pdf/2310.00590">pdf</a>, <a href="https://arxiv.org/ps/2310.00590">ps</a>, <a href="https://arxiv.org/format/2310.00590">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/10.1103/PhysRevA.108.053716">10.1103/PhysRevA.108.053716 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Chiral phase modulation and tunable broadband perfect absorber using the coherent cold atomic ensemble </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Wang%2C+Y">Yi-Xin Wang</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+Y">Yan Zhang</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Lei Du</a>, <a href="/search/physics?searchtype=author&query=Wu%2C+J">Jin-Hui Wu</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="2310.00590v1-abstract-short" style="display: inline;"> We investigate the two-channel nonreciprocal scattering of a coherent atomic ensemble under the linear spatial Kramers-Kronig modulation, which has potential applications in chiral phase modulation and broadband coherent perfect/asymmetric absorber that yet is typically unavailable in conventional continuous atomic media. In the regime of electromagnetically induced transparency, we observe the di… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.00590v1-abstract-full').style.display = 'inline'; document.getElementById('2310.00590v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.00590v1-abstract-full" style="display: none;"> We investigate the two-channel nonreciprocal scattering of a coherent atomic ensemble under the linear spatial Kramers-Kronig modulation, which has potential applications in chiral phase modulation and broadband coherent perfect/asymmetric absorber that yet is typically unavailable in conventional continuous atomic media. In the regime of electromagnetically induced transparency, we observe the direction-dependent (chiral) phase modulation, which may enrich the burgeoning chiral quantum optics and can be used for implementing photonic filters, unidirectional amplifiers, and coherent asymmetric absorbers. By simplifying the stringent generation condition of coherent perfect absorption (CPA), we demonstrate the possibility of realizing two-channel CPA with broadband and sharp edges. Our proposal may be used to design and integrate some all-optical functional devices at extremely low power levels for quantum information processing and optical communication networks. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.00590v1-abstract-full').style.display = 'none'; document.getElementById('2310.00590v1-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> 1 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. A 108, 053716 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2309.13997">arXiv:2309.13997</a> <span> [<a href="https://arxiv.org/pdf/2309.13997">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> The hidden spin-momentum locking and topological defects in unpolarized light fields </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Shi%2C+P">Peng Shi</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+M">Min Lin</a>, <a href="/search/physics?searchtype=author&query=Gou%2C+X">Xinxin Gou</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Luping Du</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+A">Aiping Yang</a>, <a href="/search/physics?searchtype=author&query=Yuan%2C+X">Xiaocong Yuan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2309.13997v1-abstract-short" style="display: inline;"> Electromagnetic waves characterized by intensity, phase, and polarization degrees of freedom are widely applied in data storage, encryption, and communications. However, these properties can be substantially affected by phase disorders and disturbances, whereas high-dimensional degrees of freedom including momentum and angular momentum of electromagnetic waves can offer new insights into their fea… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.13997v1-abstract-full').style.display = 'inline'; document.getElementById('2309.13997v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2309.13997v1-abstract-full" style="display: none;"> Electromagnetic waves characterized by intensity, phase, and polarization degrees of freedom are widely applied in data storage, encryption, and communications. However, these properties can be substantially affected by phase disorders and disturbances, whereas high-dimensional degrees of freedom including momentum and angular momentum of electromagnetic waves can offer new insights into their features and phenomena, for example topological characteristics and structures that are robust to these disturbances. Here, we discover and demonstrate theoretically and experimentally spin-momentum locking and topological defects in unpolarized light. The coherent spin is locked to the kinetic momentum except for a small coupling spin term, due to the simultaneous presence of transverse magnetic and electric components in unpolarized light. To cancel the coupling term, we employ a metal film acting as a polarizer to form some skyrmion-like spin textures at the metal/air interface. Using an in-house scanning optical microscopic system to image the out-of-plane spin density of the focused unpolarized vortex light, we obtained experimental results that coincide well with our theoretical predictions. The theory and technique promote the applications of topological defects in optical data storage, encryption, and decryption, and communications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.13997v1-abstract-full').style.display = 'none'; document.getElementById('2309.13997v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 3 figures, 47 references</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2308.08782">arXiv:2308.08782</a> <span> [<a href="https://arxiv.org/pdf/2308.08782">pdf</a>, <a href="https://arxiv.org/format/2308.08782">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/10.1103/PhysRevLett.132.153602">10.1103/PhysRevLett.132.153602 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Amplifying Frequency Up-Converted Infrared Signals with a Molecular Optomechanical Cavity </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Zou%2C+F">Fen Zou</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Lei Du</a>, <a href="/search/physics?searchtype=author&query=Li%2C+Y">Yong Li</a>, <a href="/search/physics?searchtype=author&query=Dong%2C+H">Hui Dong</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="2308.08782v3-abstract-short" style="display: inline;"> Frequency up-conversion, enabled by molecular optomechanical coupling, has recently emerged as a promising approach for converting infrared signals into the visible range through quantum coherent conversion of signals. However, detecting these converted signals poses a significant challenge due to their inherently weak signal intensity. In this work, we propose an amplification mechanism capable o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.08782v3-abstract-full').style.display = 'inline'; document.getElementById('2308.08782v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2308.08782v3-abstract-full" style="display: none;"> Frequency up-conversion, enabled by molecular optomechanical coupling, has recently emerged as a promising approach for converting infrared signals into the visible range through quantum coherent conversion of signals. However, detecting these converted signals poses a significant challenge due to their inherently weak signal intensity. In this work, we propose an amplification mechanism capable of enhancing the signal intensity by a factor of 1000 or more for the frequency up-converted infrared signal in a molecular optomechanical system. The mechanism takes advantage of the strong coupling enhancement with molecular collective mode and Stokes sideband pump. This work demonstrates a feasible approach for up-converting infrared signals to the visible range. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.08782v3-abstract-full').style.display = 'none'; document.getElementById('2308.08782v3-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, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">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. Lett. 132, 153602 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2308.04154">arXiv:2308.04154</a> <span> [<a href="https://arxiv.org/pdf/2308.04154">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Geophysics">physics.geo-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="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Probing Earth's Missing Potassium using the Unique Antimatter Signature of Geoneutrinos </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Consortium%2C+L">LiquidO Consortium</a>, <a href="/search/physics?searchtype=author&query=%3A"> :</a>, <a href="/search/physics?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/physics?searchtype=author&query=Chen%2C+M">M. Chen</a>, <a href="/search/physics?searchtype=author&query=Mantovani%2C+F">F. Mantovani</a>, <a href="/search/physics?searchtype=author&query=Serafini%2C+A">A. Serafini</a>, <a href="/search/physics?searchtype=author&query=Strati%2C+V">V. Strati</a>, <a href="/search/physics?searchtype=author&query=Apilluelo%2C+J">J. Apilluelo</a>, <a href="/search/physics?searchtype=author&query=Asquith%2C+L">L. Asquith</a>, <a href="/search/physics?searchtype=author&query=Beney%2C+J+L">J. L. Beney</a>, <a href="/search/physics?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/physics?searchtype=author&query=Bongrand%2C+M">M. Bongrand</a>, <a href="/search/physics?searchtype=author&query=Bourgeois%2C+C">C. Bourgeois</a>, <a href="/search/physics?searchtype=author&query=Breton%2C+D">D. Breton</a>, <a href="/search/physics?searchtype=author&query=Briere%2C+M">M. Briere</a>, <a href="/search/physics?searchtype=author&query=Busto%2C+J">J. Busto</a>, <a href="/search/physics?searchtype=author&query=Cadiou%2C+A">A. Cadiou</a>, <a href="/search/physics?searchtype=author&query=Calvo%2C+E">E. Calvo</a>, <a href="/search/physics?searchtype=author&query=Chaumat%2C+V">V. Chaumat</a>, <a href="/search/physics?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/physics?searchtype=author&query=Cattermole%2C+B+J">B. J. Cattermole</a>, <a href="/search/physics?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/physics?searchtype=author&query=Delafosse%2C+C">C. Delafosse</a>, <a href="/search/physics?searchtype=author&query=de+Kerret%2C+H">H. de Kerret</a>, <a href="/search/physics?searchtype=author&query=Dusini%2C+S">S. Dusini</a> , et al. (55 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="2308.04154v2-abstract-short" style="display: inline;"> The formation of the Earth remains an epoch with mysterious puzzles extending to our still incomplete understanding of the planet's potential origin and bulk composition. Direct confirmation of the Earth's internal heat engine was accomplished by the successful observation of geoneutrinos originating from uranium (U) and thorium (Th) progenies, manifestations of the planet's natural radioactivity… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.04154v2-abstract-full').style.display = 'inline'; document.getElementById('2308.04154v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2308.04154v2-abstract-full" style="display: none;"> The formation of the Earth remains an epoch with mysterious puzzles extending to our still incomplete understanding of the planet's potential origin and bulk composition. Direct confirmation of the Earth's internal heat engine was accomplished by the successful observation of geoneutrinos originating from uranium (U) and thorium (Th) progenies, manifestations of the planet's natural radioactivity dominated by potassium (40K) and the decay chains of uranium (238U) and thorium (232Th). This radiogenic energy output is critical to planetary dynamics and must be accurately measured for a complete understanding of the overall heat budget and thermal history of the Earth. Detecting geoneutrinos remains the only direct probe to do so and constitutes a challenging objective in modern neutrino physics. In particular, the intriguing potassium geoneutrinos have never been observed and thus far have been considered impractical to measure. We propose here a novel approach for potassium geoneutrino detection using the unique antimatter signature of antineutrinos to reduce the otherwise overwhelming backgrounds to observing this rarest signal. The proposed detection framework relies on the innovative LiquidO detection technique to enable positron (e+) identification and antineutrino interactions with ideal isotope targets identified here for the first time. We also provide the complete experimental methodology to yield the first potassium geoneutrino discovery. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.04154v2-abstract-full').style.display = 'none'; document.getElementById('2308.04154v2-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 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2307.03727">arXiv:2307.03727</a> <span> [<a href="https://arxiv.org/pdf/2307.03727">pdf</a>, <a href="https://arxiv.org/ps/2307.03727">ps</a>, <a href="https://arxiv.org/format/2307.03727">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optimization and Control">math.OC</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Systems and Control">eess.SY</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Analysis of PDEs">math.AP</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Classical Physics">physics.class-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Fluid Dynamics">physics.flu-dyn</span> </div> </div> <p class="title is-5 mathjax"> Bilateral boundary control of an input delayed 2-D reaction-diffusion equation </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Guan%2C+D">Dandan Guan</a>, <a href="/search/physics?searchtype=author&query=Chen%2C+Y">Yanmei Chen</a>, <a href="/search/physics?searchtype=author&query=Qi%2C+J">Jie Qi</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Linglong Du</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="2307.03727v1-abstract-short" style="display: inline;"> In this paper, a delay compensation design method based on PDE backstepping is developed for a two-dimensional reaction-diffusion partial differential equation (PDE) with bilateral input delays. The PDE is defined in a rectangular domain, and the bilateral control is imposed on a pair of opposite sides of the rectangle. To represent the delayed bilateral inputs, we introduce two 2-D transport PDEs… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2307.03727v1-abstract-full').style.display = 'inline'; document.getElementById('2307.03727v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2307.03727v1-abstract-full" style="display: none;"> In this paper, a delay compensation design method based on PDE backstepping is developed for a two-dimensional reaction-diffusion partial differential equation (PDE) with bilateral input delays. The PDE is defined in a rectangular domain, and the bilateral control is imposed on a pair of opposite sides of the rectangle. To represent the delayed bilateral inputs, we introduce two 2-D transport PDEs that form a cascade system with the original PDE. A novel set of backstepping transformations is proposed for delay compensator design, including one Volterra integral transformation and two affine Volterra integral transformations. Unlike the kernel equation for 1-D PDE systems with delayed boundary input, the resulting kernel equations for the 2-D system have singular initial conditions governed by the Dirac Delta function. Consequently, the kernel solutions are written as a double trigonometric series with singularities. To address the challenge of stability analysis posed by the singularities, we prove a set of inequalities by using the Cauchy-Schwarz inequality, the 2-D Fourier series, and the Parseval's theorem. A numerical simulation illustrates the effectiveness of the proposed delay-compensation method. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2307.03727v1-abstract-full').style.display = 'none'; document.getElementById('2307.03727v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 July, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">11 pages, 3 figures(including 8 sub-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/2305.03957">arXiv:2305.03957</a> <span> [<a href="https://arxiv.org/pdf/2305.03957">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> A study of the limits of imaging capability due to water scattering effects in underwater ghost imaging </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Li%2C+Y">Yuliang Li</a>, <a href="/search/physics?searchtype=author&query=Chen%2C+M">Mingliang Chen</a>, <a href="/search/physics?searchtype=author&query=Qi%2C+J">Jinquan Qi</a>, <a href="/search/physics?searchtype=author&query=Deng%2C+C">Chenjin Deng</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Longkun Du</a>, <a href="/search/physics?searchtype=author&query=Bo%2C+Z">Zunwang Bo</a>, <a href="/search/physics?searchtype=author&query=Han%2C+C">Chang Han</a>, <a href="/search/physics?searchtype=author&query=Mao%2C+Z">Zhihua Mao</a>, <a href="/search/physics?searchtype=author&query=He%2C+Y">Yan He</a>, <a href="/search/physics?searchtype=author&query=Shao%2C+X">Xuehui Shao</a>, <a href="/search/physics?searchtype=author&query=Han%2C+S">Shensheng Han</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2305.03957v1-abstract-short" style="display: inline;"> Underwater ghost imaging is an effective means of underwater detection. In this paper, a theoretical and experimental study of underwater ghost imaging is carried out by combining the description of underwater optical field transmission with the inherent optical parameters of the water body. This paper utilizes the Wells model and the approximate S-S scattering phase function to create a model for… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.03957v1-abstract-full').style.display = 'inline'; document.getElementById('2305.03957v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.03957v1-abstract-full" style="display: none;"> Underwater ghost imaging is an effective means of underwater detection. In this paper, a theoretical and experimental study of underwater ghost imaging is carried out by combining the description of underwater optical field transmission with the inherent optical parameters of the water body. This paper utilizes the Wells model and the approximate S-S scattering phase function to create a model for optical transmission underwater. The second-order Glauber function of the optical field is then employed to analyze the scattering field's degradation during the transmission process. This analysis is used to evaluate the impact of the water body on ghost imaging. The simulation and experimental results verify that the proposed underwater ghost imaging model can better describe the degradation effect of water bodies on ghost imaging. A series of experiments comparing underwater ghost imaging at different detection distances are also carried out in this paper. In the experiments, cooperative targets can be imaged up to 65.2m (9.3AL, at attenuation coefficient c=0.1426m-1 and the scattering coefficient b=0.052m-1) and non-cooperative targets up to 41.2m (6.4AL, at c=0.1569m-1 and b=0.081m-1) . By equating the experimental maximum imaged attenuation length for cooperative targets to Jerlov-I water (b=0.002m-1 and a=0.046m-1), the system will have a maximum imaging distance of 193m. Underwater ghost imaging is expected to achieve longer-range imaging by optimizing the system emission energy and detection sensitivity. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.03957v1-abstract-full').style.display = 'none'; document.getElementById('2305.03957v1-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 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">16 pages, 9 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2304.14860">arXiv:2304.14860</a> <span> [<a href="https://arxiv.org/pdf/2304.14860">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> </div> <p class="title is-5 mathjax"> Electron-infrared phonon coupling in ABC trilayer graphene </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Zan%2C+X">Xiaozhou Zan</a>, <a href="/search/physics?searchtype=author&query=Guo%2C+X">Xiangdong Guo</a>, <a href="/search/physics?searchtype=author&query=Deng%2C+A">Aolin Deng</a>, <a href="/search/physics?searchtype=author&query=Huang%2C+Z">Zhiheng Huang</a>, <a href="/search/physics?searchtype=author&query=Liu%2C+L">Le Liu</a>, <a href="/search/physics?searchtype=author&query=Wu%2C+F">Fanfan Wu</a>, <a href="/search/physics?searchtype=author&query=Yuan%2C+Y">Yalong Yuan</a>, <a href="/search/physics?searchtype=author&query=Zhao%2C+J">Jiaojiao Zhao</a>, <a href="/search/physics?searchtype=author&query=Peng%2C+Y">Yalin Peng</a>, <a href="/search/physics?searchtype=author&query=Li%2C+L">Lu Li</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+Y">Yangkun Zhang</a>, <a href="/search/physics?searchtype=author&query=Li%2C+X">Xiuzhen Li</a>, <a href="/search/physics?searchtype=author&query=Zhu%2C+J">Jundong Zhu</a>, <a href="/search/physics?searchtype=author&query=Dong%2C+J">Jingwei Dong</a>, <a href="/search/physics?searchtype=author&query=Shi%2C+D">Dongxia Shi</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+W">Wei Yang</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+X">Xiaoxia Yang</a>, <a href="/search/physics?searchtype=author&query=Shi%2C+Z">Zhiwen Shi</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Luojun Du</a>, <a href="/search/physics?searchtype=author&query=Dai%2C+Q">Qing Dai</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+G">Guangyu Zhang</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2304.14860v1-abstract-short" style="display: inline;"> Stacking order plays a crucial role in determining the crystal symmetry and has significant impacts on electronic, optical, magnetic, and topological properties. Electron-phonon coupling, which is central to a wide range of intriguing quantum phenomena, is expected to be intricately connected with stacking order. Understanding the stacking order-dependent electron-phonon coupling is essential for… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.14860v1-abstract-full').style.display = 'inline'; document.getElementById('2304.14860v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2304.14860v1-abstract-full" style="display: none;"> Stacking order plays a crucial role in determining the crystal symmetry and has significant impacts on electronic, optical, magnetic, and topological properties. Electron-phonon coupling, which is central to a wide range of intriguing quantum phenomena, is expected to be intricately connected with stacking order. Understanding the stacking order-dependent electron-phonon coupling is essential for understanding peculiar physical phenomena associated with electron-phonon coupling, such as superconductivity and charge density waves. In this study, we investigate the effect of stacking order on electron-infrared phonon coupling in graphene trilayers. By using gate-tunable Raman spectroscopy and excitation frequency-dependent near-field infrared nanoscopy, we show that rhombohedral ABC-stacked trilayer graphene has a significantly stronger electron-infrared phonon coupling strength than the Bernal ABA-stacked trilayer graphene. Our findings provide novel insights into the superconductivity and other fundamental physical properties of rhombohedral ABC-stacked trilayer graphene, and can enable nondestructive and high-throughput imaging of trilayer graphene stacking order using Raman scattering. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.14860v1-abstract-full').style.display = 'none'; document.getElementById('2304.14860v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 April, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2303.06281">arXiv:2303.06281</a> <span> [<a href="https://arxiv.org/pdf/2303.06281">pdf</a>, <a href="https://arxiv.org/format/2303.06281">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41467-024-47260-1">10.1038/s41467-024-47260-1 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Can the dipolar interaction suppress dipolar relaxation? </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Barral%2C+P">Pierre Barral</a>, <a href="/search/physics?searchtype=author&query=Cantara%2C+M">Michael Cantara</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Li Du</a>, <a href="/search/physics?searchtype=author&query=Lunden%2C+W">William Lunden</a>, <a href="/search/physics?searchtype=author&query=de+Hond%2C+J">Julius de Hond</a>, <a href="/search/physics?searchtype=author&query=Jamison%2C+A+O">Alan O. Jamison</a>, <a href="/search/physics?searchtype=author&query=Ketterle%2C+W">Wolfgang Ketterle</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2303.06281v1-abstract-short" style="display: inline;"> Magnetic atoms in a thin layer have repulsive interactions when their magnetic moments are aligned perpendicular to the layer. We show experimentally and theoretically how this can suppress dipolar relaxation, the dominant loss process in spin mixtures of highly magnetic atoms. Using dysprosium, we observe an order of magnitude extension of the lifetime, and another factor of ten is within reach b… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.06281v1-abstract-full').style.display = 'inline'; document.getElementById('2303.06281v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2303.06281v1-abstract-full" style="display: none;"> Magnetic atoms in a thin layer have repulsive interactions when their magnetic moments are aligned perpendicular to the layer. We show experimentally and theoretically how this can suppress dipolar relaxation, the dominant loss process in spin mixtures of highly magnetic atoms. Using dysprosium, we observe an order of magnitude extension of the lifetime, and another factor of ten is within reach based on the models which we have validated with our experimental study. The loss suppression opens up many new possibilities for quantum simulations with spin mixtures of highly magnetic atoms. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.06281v1-abstract-full').style.display = 'none'; document.getElementById('2303.06281v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">38 pages, 9 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Communications 15.1 (2024): 3566 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2302.07209">arXiv:2302.07209</a> <span> [<a href="https://arxiv.org/pdf/2302.07209">pdf</a>, <a href="https://arxiv.org/ps/2302.07209">ps</a>, <a href="https://arxiv.org/format/2302.07209">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> </div> <p class="title is-5 mathjax"> Atomic physics on a 50 nm scale: Realization of a bilayer system of dipolar atoms </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Du%2C+L">Li Du</a>, <a href="/search/physics?searchtype=author&query=Barral%2C+P">Pierre Barral</a>, <a href="/search/physics?searchtype=author&query=Cantara%2C+M">Michael Cantara</a>, <a href="/search/physics?searchtype=author&query=de+Hond%2C+J">Julius de Hond</a>, <a href="/search/physics?searchtype=author&query=Lu%2C+Y">Yu-Kun Lu</a>, <a href="/search/physics?searchtype=author&query=Ketterle%2C+W">Wolfgang Ketterle</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="2302.07209v1-abstract-short" style="display: inline;"> Atomic physics has greatly advanced quantum science, mainly due to the ability to control the position and internal quantum state of atoms with high precision, often at the quantum limit. The dominant tool for this is laser light, which can structure and localize atoms in space (e.g., in optical tweezers, optical lattices, 1D tubes or 2D planes). Due to the diffraction limit of light, the natural… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.07209v1-abstract-full').style.display = 'inline'; document.getElementById('2302.07209v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2302.07209v1-abstract-full" style="display: none;"> Atomic physics has greatly advanced quantum science, mainly due to the ability to control the position and internal quantum state of atoms with high precision, often at the quantum limit. The dominant tool for this is laser light, which can structure and localize atoms in space (e.g., in optical tweezers, optical lattices, 1D tubes or 2D planes). Due to the diffraction limit of light, the natural length scale for most experiments with atoms is on the order of 500 nm or larger. Here we implement a new super-resolution technique which localizes and arranges atoms on a sub-50 nm scale, without any fundamental limit in resolution. We demonstrate this technique by creating a bilayer of dysprosium atoms, mapping out the atomic density distribution with sub-10 nm resolution, and observing dipolar interactions between two physically separated layers via interlayer sympathetic cooling and coupled collective excitations. At 50 nm, dipolar interactions are 1,000 times stronger than at 500 nm. For two atoms in optical tweezers, this should enable purely magnetic dipolar gates with kHz speed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.07209v1-abstract-full').style.display = 'none'; document.getElementById('2302.07209v1-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> 14 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2212.04697">arXiv:2212.04697</a> <span> [<a href="https://arxiv.org/pdf/2212.04697">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acsphotonics.2c01535">10.1021/acsphotonics.2c01535 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Spin/momentum properties of the paraxial optical beams </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Shi%2C+P">Peng Shi</a>, <a href="/search/physics?searchtype=author&query=Li%2C+H">Heng Li</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Luping Du</a>, <a href="/search/physics?searchtype=author&query=Yuan%2C+X">Xiaocong Yuan</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="2212.04697v1-abstract-short" style="display: inline;"> Spin angular momentum, an elementary dynamical property of classical electromagnetic fields, plays an important role in spin-orbit and light-matter interactions, especially in near-field optics. The research on optical spins has led to the discovery of phenomena such as optical spin-momentum locking and photonic topological quasiparticles, as well as applications in high-precision detection and na… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2212.04697v1-abstract-full').style.display = 'inline'; document.getElementById('2212.04697v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2212.04697v1-abstract-full" style="display: none;"> Spin angular momentum, an elementary dynamical property of classical electromagnetic fields, plays an important role in spin-orbit and light-matter interactions, especially in near-field optics. The research on optical spins has led to the discovery of phenomena such as optical spin-momentum locking and photonic topological quasiparticles, as well as applications in high-precision detection and nanometrology. Here, we investigate spin-momentum relations in paraxial optical systems and show that the optical spin angular momentum contains transverse and longitudinal spin components simultaneously. The transverse spin originates from inhomogeneities of field and governed by the vorticity of the kinetic momentum density, whereas the longitudinal spin parallel to the local canonical momentum is proportional to the polarization ellipticity of light. Moreover, the skyrmionlike spin textures arise from the optical transverse spin can be observed in paraxial beams, and their topologies are maintained free from the influence of the Gouy phase during propagation. Interestingly, the optical singularities, including both phase and polarization singularities, can also affect the spin-momentum properties significantly. Our findings describe the intrinsic spin-momentum properties in paraxial optical systems and apply in the analysis of the properties of spin-momentum in optical focusing, imaging, and scattering systems. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2212.04697v1-abstract-full').style.display = 'none'; document.getElementById('2212.04697v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 December, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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">20 pages; 6 figures, 151 references</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2207.06517">arXiv:2207.06517</a> <span> [<a href="https://arxiv.org/pdf/2207.06517">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-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/10.1002/adma.202107104">10.1002/adma.202107104 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Probing Electronic States in Monolayer Semiconductors through Static and Transient Third-Harmonic Spectroscopy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Wang%2C+Y">Yadong Wang</a>, <a href="/search/physics?searchtype=author&query=Iyikanat%2C+F">Fadil Iyikanat</a>, <a href="/search/physics?searchtype=author&query=Rostami%2C+H">Habib Rostami</a>, <a href="/search/physics?searchtype=author&query=Bai%2C+X">Xueyin Bai</a>, <a href="/search/physics?searchtype=author&query=Hu%2C+X">Xuerong Hu</a>, <a href="/search/physics?searchtype=author&query=Das%2C+S">Susobhan Das</a>, <a href="/search/physics?searchtype=author&query=Dai%2C+Y">Yunyun Dai</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Luojun Du</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+Y">Yi Zhang</a>, <a href="/search/physics?searchtype=author&query=Li%2C+S">Shisheng Li</a>, <a href="/search/physics?searchtype=author&query=Lipsanen%2C+H">Harri Lipsanen</a>, <a href="/search/physics?searchtype=author&query=de+Abajo%2C+F+J+G">F. Javier Garc铆a de Abajo</a>, <a href="/search/physics?searchtype=author&query=Sun%2C+Z">Zhipei Sun</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="2207.06517v1-abstract-short" style="display: inline;"> Electronic states and their dynamics are of critical importance for electronic and optoelectronic applications. Here, we probe various relevant electronic states in monolayer MoS2, such as multiple excitonic Rydberg states and free-particle energy bands, with a high relative contrast of up to >200 via broadband (from ~1.79 to 3.10 eV) static third-harmonic spectroscopy, which is further supported… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.06517v1-abstract-full').style.display = 'inline'; document.getElementById('2207.06517v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2207.06517v1-abstract-full" style="display: none;"> Electronic states and their dynamics are of critical importance for electronic and optoelectronic applications. Here, we probe various relevant electronic states in monolayer MoS2, such as multiple excitonic Rydberg states and free-particle energy bands, with a high relative contrast of up to >200 via broadband (from ~1.79 to 3.10 eV) static third-harmonic spectroscopy, which is further supported by theoretical calculations. Moreover, we introduce transient third-harmonic spectroscopy to demonstrate that third-harmonic generation can be all-optically modulated with a modulation depth exceeding ~94% at ~2.18 eV, providing direct evidence of dominant carrier relaxation processes, associated with carrier-exciton and carrier-phonon interactions. Our results indicate that static and transient third-harmonic spectroscopies are not only promising techniques for the characterization of monolayer semiconductors and their heterostructures, but also a potential platform for disruptive photonic and optoelectronic applications, including all-optical modulation and imaging. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.06517v1-abstract-full').style.display = 'none'; document.getElementById('2207.06517v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 July, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">17 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Advanced Materials, 2022, 34, 2107104 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2205.10329">arXiv:2205.10329</a> <span> [<a href="https://arxiv.org/pdf/2205.10329">pdf</a>, <a href="https://arxiv.org/format/2205.10329">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> </div> </div> <p class="title is-5 mathjax"> Optical skyrmions and other topological quasiparticles of light </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Shen%2C+Y">Yijie Shen</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+Q">Qiang Zhang</a>, <a href="/search/physics?searchtype=author&query=Shi%2C+P">Peng Shi</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Luping Du</a>, <a href="/search/physics?searchtype=author&query=Yuan%2C+X">Xiaocong Yuan</a>, <a href="/search/physics?searchtype=author&query=Zayats%2C+A+V">Anatoly V. Zayats</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2205.10329v3-abstract-short" style="display: inline;"> Skyrmions are topologically stable quasiparticles that have been predicted and demonstrated in quantum fields, solid-state physics, and magnetic materials, but only recently observed in electromagnetic fields, triggering fast expanding research across different spectral ranges and applications. Here we review the recent advances in optical skyrmions within a unified framework. Starting from fundam… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2205.10329v3-abstract-full').style.display = 'inline'; document.getElementById('2205.10329v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2205.10329v3-abstract-full" style="display: none;"> Skyrmions are topologically stable quasiparticles that have been predicted and demonstrated in quantum fields, solid-state physics, and magnetic materials, but only recently observed in electromagnetic fields, triggering fast expanding research across different spectral ranges and applications. Here we review the recent advances in optical skyrmions within a unified framework. Starting from fundamental theories, including classification of skyrmionic states, we describe generation and topological control of different kinds of optical skyrmions in structured and time-dependent optical fields. We further highlight generalized classes of optical topological quasiparticles beyond skyrmions and outline the emerging applications, future trends, and open challenges. A complex vectorial field structure of optical quasiparticles with versatile topological characteristics emerges as an important feature in modern spin-optics, imaging and metrology, optical forces, structured light and topological and quantum technologies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2205.10329v3-abstract-full').style.display = 'none'; document.getElementById('2205.10329v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 May, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2204.06524">arXiv:2204.06524</a> <span> [<a href="https://arxiv.org/pdf/2204.06524">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Soft Condensed Matter">cond-mat.soft</span> </div> </div> <p class="title is-5 mathjax"> Understanding the Spin Crossover Dynamical Effects of the Dioxygen Binding and Activation on HOD enzyme </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Du%2C+L">Likai Du</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="2204.06524v1-abstract-short" style="display: inline;"> For the cofactor-free 1-H-3-hydroxy-4-oxoquinaldine-2,4-dioxygenase (HOD), the dioxygen (O2) dependent steps are rate-limiting along with a spin state crossover to the singlet spin state. Here, the primary triplet O2 molecule activation on the 2-methyl-3-hydroxy-4(1H)-quinolone (MHQ) is investigated, and the catalytic role of the intersystem crossing effects is highlighted by directly comparing re… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2204.06524v1-abstract-full').style.display = 'inline'; document.getElementById('2204.06524v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2204.06524v1-abstract-full" style="display: none;"> For the cofactor-free 1-H-3-hydroxy-4-oxoquinaldine-2,4-dioxygenase (HOD), the dioxygen (O2) dependent steps are rate-limiting along with a spin state crossover to the singlet spin state. Here, the primary triplet O2 molecule activation on the 2-methyl-3-hydroxy-4(1H)-quinolone (MHQ) is investigated, and the catalytic role of the intersystem crossing effects is highlighted by directly comparing results from the Born-Oppenheimer dynamics and non-adiabatic surface hopping dynamics. This work confirms non-adiabatic dynamical effects are essential to modulate the O2 activation on the substrate MHQ. The time scale of the equilibration and conversion from triplet to singlet state should be in the range of a few hundreds of femtoseconds. We hope this work provides us a fresh look at the underlying physics of dioxygen activation reactions involving more than one spin state. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2204.06524v1-abstract-full').style.display = 'none'; document.getElementById('2204.06524v1-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 April, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2203.09720">arXiv:2203.09720</a> <span> [<a href="https://arxiv.org/pdf/2203.09720">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link 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="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1093/nsr/nwac077">10.1093/nsr/nwac077 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Layer-by-Layer Epitaxy of Multilayer MoS2 Wafers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Wang%2C+Q">Qinqin Wang</a>, <a href="/search/physics?searchtype=author&query=Tang%2C+J">Jian Tang</a>, <a href="/search/physics?searchtype=author&query=Li%2C+X">Xiaomei Li</a>, <a href="/search/physics?searchtype=author&query=Tian%2C+J">Jinpeng Tian</a>, <a href="/search/physics?searchtype=author&query=Liang%2C+J">Jing Liang</a>, <a href="/search/physics?searchtype=author&query=Li%2C+N">Na Li</a>, <a href="/search/physics?searchtype=author&query=Ji%2C+D">Depeng Ji</a>, <a href="/search/physics?searchtype=author&query=Xian%2C+L">Lede Xian</a>, <a href="/search/physics?searchtype=author&query=Guo%2C+Y">Yutuo Guo</a>, <a href="/search/physics?searchtype=author&query=Li%2C+L">Lu Li</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+Q">Qinghua Zhang</a>, <a href="/search/physics?searchtype=author&query=Chu%2C+Y">Yanbang Chu</a>, <a href="/search/physics?searchtype=author&query=Wei%2C+Z">Zheng Wei</a>, <a href="/search/physics?searchtype=author&query=Zhao%2C+Y">Yanchong Zhao</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Luojun Du</a>, <a href="/search/physics?searchtype=author&query=Bai%2C+H+Y+X">Hua Yu Xuedong Bai</a>, <a href="/search/physics?searchtype=author&query=Gu%2C+L">Lin Gu</a>, <a href="/search/physics?searchtype=author&query=Liu%2C+K">Kaihui Liu</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+W">Wei Yang</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+R">Rong Yang</a>, <a href="/search/physics?searchtype=author&query=Shi%2C+D">Dongxia Shi</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+G">Guangyu Zhang</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="2203.09720v1-abstract-short" style="display: inline;"> Two-dimensional (2D) semiconductor of MoS2 has great potential for advanced electronics technologies beyond silicon1-9. So far, high-quality monolayer MoS2 wafers10-12 are already available and various demonstrations from individual transistors to integrated circuits have also been shown13-15. In addition to the monolayer, multilayers have narrower band gaps but improved carrier mobilities and cur… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.09720v1-abstract-full').style.display = 'inline'; document.getElementById('2203.09720v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.09720v1-abstract-full" style="display: none;"> Two-dimensional (2D) semiconductor of MoS2 has great potential for advanced electronics technologies beyond silicon1-9. So far, high-quality monolayer MoS2 wafers10-12 are already available and various demonstrations from individual transistors to integrated circuits have also been shown13-15. In addition to the monolayer, multilayers have narrower band gaps but improved carrier mobilities and current capacities over the monolayer5,16-18. However, achieving high-quality multilayer MoS2 wafers remains a challenge. Here we report the growth of high quality multilayer MoS2 4-inch wafers via the layer-by-layer epitaxy process. The epitaxy leads to well-defined stacking orders between adjacent epitaxial layers and offers a delicate control of layer numbers up to 6. Systematic evaluations on the atomic structures and electronic properties were carried out for achieved wafers with different layer numbers. Significant improvements on device performances were found in thicker-layer field effect transistors (FETs), as expected. For example, the average field-effect mobility (渭FE) at room temperature (RT) can increase from ~80 cm2V-1s-1 for monolayer to ~110/145 cm2V-1s-1 for bilayer/trilayer devices. The highest RT 渭FE=234.7 cm2V-1s-1 and a record-high on-current densities of 1.704 mA渭m-1 at Vds=2 V were also achieved in trilayer MoS2 FETs with a high on/off ratio exceeding 107. Our work hence moves a step closer to practical applications of 2D MoS2 in electronics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.09720v1-abstract-full').style.display = 'none'; document.getElementById('2203.09720v1-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 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages,4 Figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Natl. Sci. Rev. 9, nwac077 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2202.09007">arXiv:2202.09007</a> <span> [<a href="https://arxiv.org/pdf/2202.09007">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.128.213904">10.1103/PhysRevLett.128.213904 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Intrinsic spin-momentum dynamics of surface electromagnetic waves in complex dispersive system </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Shi%2C+P">Peng Shi</a>, <a href="/search/physics?searchtype=author&query=Lei%2C+X">Xinrui Lei</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+Q">Qiang Zhang</a>, <a href="/search/physics?searchtype=author&query=Li%2C+H">Heng Li</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Luping Du</a>, <a href="/search/physics?searchtype=author&query=Yuan%2C+X">Xiaocong Yuan</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="2202.09007v1-abstract-short" style="display: inline;"> Spin-momentum locking is an intrinsic property of surface electromagnetic fields and its study has led to the discovery of photonic spin lattices and diverse applications. Previously, dispersion was ignored in the spin-momentum locking, giving rise to abnormal phenomena contradictory to the physical realities. Here, we formulate four dispersive spin-momentum equations for surface waves, revealing… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.09007v1-abstract-full').style.display = 'inline'; document.getElementById('2202.09007v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2202.09007v1-abstract-full" style="display: none;"> Spin-momentum locking is an intrinsic property of surface electromagnetic fields and its study has led to the discovery of photonic spin lattices and diverse applications. Previously, dispersion was ignored in the spin-momentum locking, giving rise to abnormal phenomena contradictory to the physical realities. Here, we formulate four dispersive spin-momentum equations for surface waves, revealing universally that the transverse spin vector is locked with the momentum. The locking property obeys the right-hand rule in the dielectric but the left-hand rule in the dispersive metal/magnetic materials. In addition to the dispersion, the structural features can affect the spin-momentum locking significantly. Remarkably, an extraordinary longitudinal spin originating from the coupling polarization ellipticity is uncovered even for the purely polarized state. We further demonstrate the spin-momentum locking properties with diverse photonic topological lattices by engineering the rotating symmetry. The findings open up opportunities for designing robust nanodevices with practical importance in chiral quantum optics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.09007v1-abstract-full').style.display = 'none'; document.getElementById('2202.09007v1-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 February, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 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">6 pages, 4 figures in main text 36 pages, 15 figures and 81 equations in supplemental materials</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.08830">arXiv:2109.08830</a> <span> [<a href="https://arxiv.org/pdf/2109.08830">pdf</a>, <a href="https://arxiv.org/format/2109.08830">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Machine Learning">cs.LG</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computation and Language">cs.CL</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> </div> <p class="title is-5 mathjax"> Multilingual Molecular Representation Learning via Contrastive Pre-training </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Guo%2C+Z">Zhihui Guo</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+P">Pramod Sharma</a>, <a href="/search/physics?searchtype=author&query=Martinez%2C+A">Andy Martinez</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Liang Du</a>, <a href="/search/physics?searchtype=author&query=Abraham%2C+R">Robin Abraham</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2109.08830v3-abstract-short" style="display: inline;"> Molecular representation learning plays an essential role in cheminformatics. Recently, language model-based approaches have gained popularity as an alternative to traditional expert-designed features to encode molecules. However, these approaches only utilize a single molecular language for representation learning. Motivated by the fact that a given molecule can be described using different langu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.08830v3-abstract-full').style.display = 'inline'; document.getElementById('2109.08830v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.08830v3-abstract-full" style="display: none;"> Molecular representation learning plays an essential role in cheminformatics. Recently, language model-based approaches have gained popularity as an alternative to traditional expert-designed features to encode molecules. However, these approaches only utilize a single molecular language for representation learning. Motivated by the fact that a given molecule can be described using different languages such as Simplified Molecular Line Entry System (SMILES), The International Union of Pure and Applied Chemistry (IUPAC), and The IUPAC International Chemical Identifier (InChI), we propose a multilingual molecular embedding generation approach called MM-Deacon (multilingual molecular domain embedding analysis via contrastive learning). MM-Deacon is pre-trained using SMILES and IUPAC as two different languages on large-scale molecules. We evaluated the robustness of our method on seven molecular property prediction tasks from MoleculeNet benchmark, zero-shot cross-lingual retrieval, and a drug-drug interaction prediction task. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.08830v3-abstract-full').style.display = 'none'; document.getElementById('2109.08830v3-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, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted to ACL 2022 main conference</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2108.00725">arXiv:2108.00725</a> <span> [<a href="https://arxiv.org/pdf/2108.00725">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Spin decomposition and topological properties in a generic electromagnetic field </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Shi%2C+P">Peng Shi</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+A">Aiping Yang</a>, <a href="/search/physics?searchtype=author&query=Yin%2C+X">Xiaojin Yin</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Luping Du</a>, <a href="/search/physics?searchtype=author&query=Lei%2C+X">Xinrui Lei</a>, <a href="/search/physics?searchtype=author&query=Yuan%2C+X">Xiaocong Yuan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2108.00725v5-abstract-short" style="display: inline;"> Electromagnetic spins, including longitudinal and transverse ones, have been playing important roles in light-matter interactions. Here, we formulate a unified equation to uncover the physical origins and topological properties of longitudinal and transverse spins in a generic electromagnetic field. The equation reveals universally that the transverse spin is locked with the kinetic momentum and o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.00725v5-abstract-full').style.display = 'inline'; document.getElementById('2108.00725v5-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2108.00725v5-abstract-full" style="display: none;"> Electromagnetic spins, including longitudinal and transverse ones, have been playing important roles in light-matter interactions. Here, we formulate a unified equation to uncover the physical origins and topological properties of longitudinal and transverse spins in a generic electromagnetic field. The equation reveals universally that the transverse spin is locked with the kinetic momentum and originated from the transverse inhomogeneities of field, whereas the helix-dependent longitudinal spin orients parallel to the local wavevector. Remarkably, a hidden extraordinary helix-dependent transverse spin possessing helix-dependent spin-momentum locking is discovered and the number of locking states consistent with the nontrivial topological spin Chern number. Furthermore, this spin which determines the inverted helical components is related to the Berry curvature closely. The findings, which are demonstrated experimentally by measuring the three-dimensional spin components in the focusing configuration, will deepen the understanding the underlying physics of spins and open an avenue for chiral quantum optical applications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.00725v5-abstract-full').style.display = 'none'; document.getElementById('2108.00725v5-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 November, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15 pages, 3 figures, 2 table, 7 equations, 56 references in main text; 39 pages, 16 figures, 100 equations, 16 references in supplemental materials</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2107.05500">arXiv:2107.05500</a> <span> [<a href="https://arxiv.org/pdf/2107.05500">pdf</a>, <a href="https://arxiv.org/format/2107.05500">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Plasma Physics">physics.plasm-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2021.136820">10.1016/j.physletb.2021.136820 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Non-conformal attractor in boost-invariant plasmas </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Chattopadhyay%2C+C">Chandrodoy Chattopadhyay</a>, <a href="/search/physics?searchtype=author&query=Jaiswal%2C+S">Sunil Jaiswal</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Lipei Du</a>, <a href="/search/physics?searchtype=author&query=Heinz%2C+U">Ulrich Heinz</a>, <a href="/search/physics?searchtype=author&query=Pal%2C+S">Subrata Pal</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="2107.05500v1-abstract-short" style="display: inline;"> We study the dissipative evolution of (0+1)-dimensionally expanding media with Bjorken symmetry using the Boltzmann equation for massive particles in relaxation-time approximation. Breaking conformal symmetry by a mass induces a non-zero bulk viscous pressure in the medium. It is shown that even a small mass (in units of the local temperature) drastically modifies the well-known attractor for the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.05500v1-abstract-full').style.display = 'inline'; document.getElementById('2107.05500v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2107.05500v1-abstract-full" style="display: none;"> We study the dissipative evolution of (0+1)-dimensionally expanding media with Bjorken symmetry using the Boltzmann equation for massive particles in relaxation-time approximation. Breaking conformal symmetry by a mass induces a non-zero bulk viscous pressure in the medium. It is shown that even a small mass (in units of the local temperature) drastically modifies the well-known attractor for the shear Reynolds number previously observed in massless systems. For generic nonzero particle mass, neither the shear nor the bulk viscous pressure relax quickly to a non-equilibrium attractor; they approach the hydrodynamic limit only late, at small values of the inverse Reynolds numbers. Only the longitudinal pressure, which is a combination of thermal, shear and bulk viscous pressures, continues to show early approach to a far-off-equilibrium attractor, driven by the rapid longitudinal expansion at early times. Second-order dissipative hydrodynamics based on a gradient expansion around locally isotropic thermal equilibrium fails to reproduce this attractor. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.05500v1-abstract-full').style.display = 'none'; document.getElementById('2107.05500v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 July, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2104.12982">arXiv:2104.12982</a> <span> [<a href="https://arxiv.org/pdf/2104.12982">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </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/10.1002/lpor.202000554">10.1002/lpor.202000554 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Symmetry-protected photonic chiral spin textures by spin-orbit coupling </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Shi%2C+P">Peng Shi</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Luping Du</a>, <a href="/search/physics?searchtype=author&query=Li%2C+M">Mingjie Li</a>, <a href="/search/physics?searchtype=author&query=Yuan%2C+X">Xiaocong Yuan</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="2104.12982v1-abstract-short" style="display: inline;"> Chiral spin textures are researched widely in condensed matter systems and show potential for spintronics and storage applications. Along with extensive condensed-matter studies of chiral spin textures, photonic counterparts of these textures have been observed in various optical systems with broken inversion symmetry. Unfortunately, the resemblances are only phenomenological. This work proposes a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.12982v1-abstract-full').style.display = 'inline'; document.getElementById('2104.12982v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2104.12982v1-abstract-full" style="display: none;"> Chiral spin textures are researched widely in condensed matter systems and show potential for spintronics and storage applications. Along with extensive condensed-matter studies of chiral spin textures, photonic counterparts of these textures have been observed in various optical systems with broken inversion symmetry. Unfortunately, the resemblances are only phenomenological. This work proposes a theoretical framework based on the variational theorem to show that the formation of photonic chiral spin textures in an optical interface is derived from the system's symmetry and relativity. Analysis of the optical system's rotational symmetry indicates that conservation of the total angular momentum is preserved from the local variations of spin vectors. Specifically, although the integral spin momentum does not carry net energy, the local spin momentum distribution, which determines the local subluminal energy transport and minimization variation of the square of total angular momentum, results in the chiral twisting of the spin vectors. The findings here deepen the understanding of the symmetries, conservative laws and energy transportation in optical system, construct the comparability in the formation mechanisms and geometries of photonic and condensed-matter chiral spin textures, and suggest applications to optical manipulation and chiral photonics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.12982v1-abstract-full').style.display = 'none'; document.getElementById('2104.12982v1-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> 27 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">20 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2103.15366">arXiv:2103.15366</a> <span> [<a href="https://arxiv.org/pdf/2103.15366">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </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.127.237403">10.1103/PhysRevLett.127.237403 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Photonic spin lattices: symmetry constraints for skyrmion and meron topologies </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Lei%2C+X">Xinrui Lei</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+A">Aiping Yang</a>, <a href="/search/physics?searchtype=author&query=Shi%2C+P">Peng Shi</a>, <a href="/search/physics?searchtype=author&query=Xie%2C+Z">Zhenwei Xie</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Luping Du</a>, <a href="/search/physics?searchtype=author&query=Zayats%2C+A+V">Anatoly V. Zayats</a>, <a href="/search/physics?searchtype=author&query=Yuan%2C+X">Xiaocong Yuan</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="2103.15366v1-abstract-short" style="display: inline;"> Symmetry governs many electronic and photonic phenomena in optics and condensed matter physics. Skyrmions and merons are prominent topological structures in magnetic materials, with the topological features determined by the interplay between anisotropy of a material and its magnetization. Here we theoretically show and experimentally demonstrate that the symmetry of the electromagnetic field dete… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.15366v1-abstract-full').style.display = 'inline'; document.getElementById('2103.15366v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2103.15366v1-abstract-full" style="display: none;"> Symmetry governs many electronic and photonic phenomena in optics and condensed matter physics. Skyrmions and merons are prominent topological structures in magnetic materials, with the topological features determined by the interplay between anisotropy of a material and its magnetization. Here we theoretically show and experimentally demonstrate that the symmetry of the electromagnetic field determines the spin topological properties of the guided modes via spin-orbit coupling and may only result in either hexagonal spin-skyrmion or square spin-meron lattices. We also show that in the absence of spin-orbit coupling these spin topologies are degenerated in dynamic field-skyrmions, unifying description of electromagnetic field topologies. The results provide new understanding of electromagnetic field topology and its transformations as well as new opportunities for applications in quantum optics, spin-optics and topological photonics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.15366v1-abstract-full').style.display = 'none'; document.getElementById('2103.15366v1-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 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2103.14288">arXiv:2103.14288</a> <span> [<a href="https://arxiv.org/pdf/2103.14288">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Parasitic modes suppression in CW cold tests of 1.3 GHz 9-cell high Q cavities at IHEP </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Mi%2C+Z">Zhenghui Mi</a>, <a href="/search/physics?searchtype=author&query=He%2C+F">Feisi He</a>, <a href="/search/physics?searchtype=author&query=Pan%2C+W">Weimin Pan</a>, <a href="/search/physics?searchtype=author&query=Sha%2C+P">Peng Sha</a>, <a href="/search/physics?searchtype=author&query=Zhai%2C+J">Jiyuan Zhai</a>, <a href="/search/physics?searchtype=author&query=Dai%2C+X">Xuwen Dai</a>, <a href="/search/physics?searchtype=author&query=Jina%2C+S">Song Jina</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+Z">Zhanjun Zhang</a>, <a href="/search/physics?searchtype=author&query=Dong%2C+C">Chao Dong</a>, <a href="/search/physics?searchtype=author&query=Liu%2C+B">Baiqi Liu</a>, <a href="/search/physics?searchtype=author&query=Zhao%2C+H">Hui Zhao</a>, <a href="/search/physics?searchtype=author&query=Gea%2C+R">Rui Gea</a>, <a href="/search/physics?searchtype=author&query=Zhao%2C+J">Jianbing Zhao</a>, <a href="/search/physics?searchtype=author&query=Mu%2C+Z">Zhihui Mu</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Lei Du</a>, <a href="/search/physics?searchtype=author&query=Sun%2C+L">Liangrui Sun</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+L">Liang Zhang</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+C">Conglai Yang</a>, <a href="/search/physics?searchtype=author&query=Zheng%2C+X">Xiaobing Zheng</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+H">Haiying Lin</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+G">Guangwei Wang</a>, <a href="/search/physics?searchtype=author&query=He%2C+X">Xiangcong He</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="2103.14288v1-abstract-short" style="display: inline;"> The CW RF test of 1.3 GHz 9-cell cavity in liquid helium bath at 2 K is a very important key point in the cavity procurement. Some problems can be found through the test, according which to optimized and improve the process of cavity. Recently, Medium temperature (mid-T) furnace bake of 1.3 GHz 9-cell cavities have been carried out at IHEP. Through the proceed of mid-T bake, the quality factor of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.14288v1-abstract-full').style.display = 'inline'; document.getElementById('2103.14288v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2103.14288v1-abstract-full" style="display: none;"> The CW RF test of 1.3 GHz 9-cell cavity in liquid helium bath at 2 K is a very important key point in the cavity procurement. Some problems can be found through the test, according which to optimized and improve the process of cavity. Recently, Medium temperature (mid-T) furnace bake of 1.3 GHz 9-cell cavities have been carried out at IHEP. Through the proceed of mid-T bake, the quality factor of cavity has been greatly improved. While the excitation of the parasitic modes in the high Q cavities CW cold test has been encountered, which implies an error source for the cavity gradient and quality factor determination. In order to ensure the testing accuracy of superconducting cavity, we have improved the testing system. Finally, the parasitic mode is completely suppressed and the CW RF cold test of high Q cavity is guaranteed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.14288v1-abstract-full').style.display = 'none'; document.getElementById('2103.14288v1-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> 26 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2101.06370">arXiv:2101.06370</a> <span> [<a href="https://arxiv.org/pdf/2101.06370">pdf</a>, <a href="https://arxiv.org/ps/2101.06370">ps</a>, <a href="https://arxiv.org/format/2101.06370">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Analysis of PDEs">math.AP</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Fluid Dynamics">physics.flu-dyn</span> </div> </div> <p class="title is-5 mathjax"> Steady collision of two jets issuing from two axially symmetric channels </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Du%2C+L">Lili Du</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+Y">Yongfu Wang</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="2101.06370v1-abstract-short" style="display: inline;"> In the classical survey (Chapter 16.2, {\it Mathematics in industrial problem}, Vol. 24, Springer-Verlag, New York, 1989), A. Friedman proposed an open problem on the collision of two incompressible jets emerging from two axially symmetric nozzles. In this paper, we concerned with the mathematical theory on this collision problem, and establish the well-posedness theory on hydrodynamic impinging o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.06370v1-abstract-full').style.display = 'inline'; document.getElementById('2101.06370v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2101.06370v1-abstract-full" style="display: none;"> In the classical survey (Chapter 16.2, {\it Mathematics in industrial problem}, Vol. 24, Springer-Verlag, New York, 1989), A. Friedman proposed an open problem on the collision of two incompressible jets emerging from two axially symmetric nozzles. In this paper, we concerned with the mathematical theory on this collision problem, and establish the well-posedness theory on hydrodynamic impinging outgoing jets issuing from two coaxial axially symmetric nozzles. More precisely, we showed that for any given mass fluxes $M_1>0$ and $M_2<0$ in two nozzles respectively, that there exists an incompressible, inviscid impinging outgoing jet with contact discontinuity, which issues from two given semi-infinitely long axially symmetric nozzles and extends to infinity. Moreover, the constant pressure free stream surfaces of the impinging jet initiate smoothly from the mouths of the two nozzles and shrink to some asymptotic conical surface. There exists a smooth surface separating the two incompressible fluids and the contact discontinuity occurs on the surface. Furthermore, we showed that there is no stagnation point in the flow field and its closure, except one point on the symmetric axis. Some asymptotic behavior of the impinging jet in upstream and downstream, geometric properties of the free stream surfaces are also obtained. The main results in this paper solved the open problem on the collision of two incompressible axially symmetric jets in [24]. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.06370v1-abstract-full').style.display = 'none'; document.getElementById('2101.06370v1-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 January, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">42 pages, 10 figures. Accepted for publication in SIAM J. Math. Anal</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">MSC Class:</span> 76B10; 76B03; 35Q31; 35J25 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2012.04817">arXiv:2012.04817</a> <span> [<a href="https://arxiv.org/pdf/2012.04817">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> Medium-temperature furnace bake of Superconducting Radio-Frequency cavities at IHEP </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=He%2C+F">Feisi He</a>, <a href="/search/physics?searchtype=author&query=Pan%2C+W">Weimin Pan</a>, <a href="/search/physics?searchtype=author&query=Sha%2C+P">Peng Sha</a>, <a href="/search/physics?searchtype=author&query=Zhai%2C+J">Jiyuan Zhai</a>, <a href="/search/physics?searchtype=author&query=Mi%2C+Z">Zhenghui Mi</a>, <a href="/search/physics?searchtype=author&query=Dai%2C+X">Xuwen Dai</a>, <a href="/search/physics?searchtype=author&query=Jin%2C+S">Song Jin</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+Z">Zhanjun Zhang</a>, <a href="/search/physics?searchtype=author&query=Dong%2C+C">Chao Dong</a>, <a href="/search/physics?searchtype=author&query=Liu%2C+B">Baiqi Liu</a>, <a href="/search/physics?searchtype=author&query=Zhao%2C+H">Hui Zhao</a>, <a href="/search/physics?searchtype=author&query=Ge%2C+R">Rui Ge</a>, <a href="/search/physics?searchtype=author&query=Zhao%2C+J">Jianbing Zhao</a>, <a href="/search/physics?searchtype=author&query=Mu%2C+Z">Zhihui Mu</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Lei Du</a>, <a href="/search/physics?searchtype=author&query=Sun%2C+L">Liangrui Sun</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+L">Liang Zhang</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+C">Conglai Yang</a>, <a href="/search/physics?searchtype=author&query=Zheng%2C+X">Xiaobing Zheng</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="2012.04817v1-abstract-short" style="display: inline;"> Recently, heat treatment between 250 C and 500 C has been attempted to improve quality factor of superconducting radio-frequency cavities at FNAL and KEK. Experiments of such medium temperature (mid-T) bake with furnaces have also been carried out at IHEP. Firstly, eleven 1.3 GHz 1-cell cavities were treated with different temperatures at a small furnace. The average quality factor has reached 3.6… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.04817v1-abstract-full').style.display = 'inline'; document.getElementById('2012.04817v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2012.04817v1-abstract-full" style="display: none;"> Recently, heat treatment between 250 C and 500 C has been attempted to improve quality factor of superconducting radio-frequency cavities at FNAL and KEK. Experiments of such medium temperature (mid-T) bake with furnaces have also been carried out at IHEP. Firstly, eleven 1.3 GHz 1-cell cavities were treated with different temperatures at a small furnace. The average quality factor has reached 3.6E10 when the gradient is 16 MV/m. Then, the recipe of mid-T furnace bake at 300 C for 3 hours has been applied to six 1.3 GHz 9-cell cavities at a new big furnace. The average quality factor has reached 3.8E10 when the gradient is 16 MV/m. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.04817v1-abstract-full').style.display = 'none'; document.getElementById('2012.04817v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 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">10 pages, 12 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/2012.01015">arXiv:2012.01015</a> <span> [<a href="https://arxiv.org/pdf/2012.01015">pdf</a>, <a href="https://arxiv.org/ps/2012.01015">ps</a>, <a href="https://arxiv.org/format/2012.01015">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="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevResearch.3.023109">10.1103/PhysRevResearch.3.023109 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Bloch-type photonic skyrmions in optical chiral multilayers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Zhang%2C+Q">Qiang Zhang</a>, <a href="/search/physics?searchtype=author&query=Xie%2C+Z">Zhenwei Xie</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Luping Du</a>, <a href="/search/physics?searchtype=author&query=Shi%2C+P">Peng Shi</a>, <a href="/search/physics?searchtype=author&query=Yuan%2C+X">Xiaocong Yuan</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="2012.01015v2-abstract-short" style="display: inline;"> Magnetic skyrmions are topological quasiparticles in magnetic field. Until recently, as one of their photonic counterparts, N茅el-type photonic skyrmion is discovered in surface plasmon polaritons. The deep-subwavelength features of the photonic skyrmions suggest their potentials in quantum technologies and data storage. So far, the Bloch-type photonic skyrmion has yet to be demonstrated in this br… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.01015v2-abstract-full').style.display = 'inline'; document.getElementById('2012.01015v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2012.01015v2-abstract-full" style="display: none;"> Magnetic skyrmions are topological quasiparticles in magnetic field. Until recently, as one of their photonic counterparts, N茅el-type photonic skyrmion is discovered in surface plasmon polaritons. The deep-subwavelength features of the photonic skyrmions suggest their potentials in quantum technologies and data storage. So far, the Bloch-type photonic skyrmion has yet to be demonstrated in this brand new research field. Here, by exploiting the quantum spin Hall effect of a plasmonic optical vortex in multilayered structure, we predict the existence of photonic twisted-N茅el- and Bloch-type skyrmions in chiral materials. Their chirality-dependent features can be considered as additional degrees-of-freedom for future chiral sensing, information processing and storage technologies. In particular, our findings enlarge the family of photonic skyrmions and reveal a remarkable resemblance of the feature of chiral materials in two seemingly distant fields: photonic skyrmions and magnetic skyrmions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.01015v2-abstract-full').style.display = 'none'; document.getElementById('2012.01015v2-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 December, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 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> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Research 3, 023109 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.09319">arXiv:2010.09319</a> <span> [<a href="https://arxiv.org/pdf/2010.09319">pdf</a>, <a href="https://arxiv.org/ps/2010.09319">ps</a>, <a href="https://arxiv.org/format/2010.09319">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="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/10.1364/OE.412996">10.1364/OE.412996 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Controllable optical response and tunable sensing based on self interference in waveguide QED systems </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Du%2C+L">Lei Du</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+Z">Zhihai Wang</a>, <a href="/search/physics?searchtype=author&query=Li%2C+Y">Yong Li</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2010.09319v2-abstract-short" style="display: inline;"> We study the self interference effect of a resonator coupled with a bent waveguide at two separated ports. Such interference effects are shown to be similar for the cases of standing-wave and traveling-wave resonators, while in the system of two separated resonators indirectly coupled via a waveguide, the coupling forms and the related interference effects depend on which kind of resonators is cho… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.09319v2-abstract-full').style.display = 'inline'; document.getElementById('2010.09319v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.09319v2-abstract-full" style="display: none;"> We study the self interference effect of a resonator coupled with a bent waveguide at two separated ports. Such interference effects are shown to be similar for the cases of standing-wave and traveling-wave resonators, while in the system of two separated resonators indirectly coupled via a waveguide, the coupling forms and the related interference effects depend on which kind of resonators is chosen. Due to the self interference, controllable optical responses including tunable linewidth and frequency shift, and optical dark state can be achieved. Moreover, we consider a self-interference photon-magnon hybrid model and show phase-dependent Fano-like line shapes which have potential applications in frequency sensing. The photon-magnon hybridization can not only enhance the sensitivity and provide tunable working region, but also enables optical readout of the magnetic field strength in turn. The results in this paper provide a deeper insight into the self interference effect and its potential applications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.09319v2-abstract-full').style.display = 'none'; document.getElementById('2010.09319v2-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 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">10 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/2003.00284">arXiv:2003.00284</a> <span> [<a href="https://arxiv.org/pdf/2003.00284">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </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/10.1039/d0nr00618a">10.1039/d0nr00618a <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Mapping the near-field spin angular momenta in the structured surface plasmon polaritons field </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Li%2C+C">Congcong Li</a>, <a href="/search/physics?searchtype=author&query=Shi%2C+P">Peng Shi</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Luping Du</a>, <a href="/search/physics?searchtype=author&query=Yuan%2C+X">Xiaocong Yuan</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="2003.00284v2-abstract-short" style="display: inline;"> Optical spin angular momenta in a confined electromagnetic field exhibit remarkable difference with their free space counterparts, in particular, the optical transverse spin that is locked with the energy propagating direction lays the foundation for many intriguing physical effects such as unidirectional transportation, quantum spin Hall effect, photonic Skyrmion, etc. In order to investigate the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.00284v2-abstract-full').style.display = 'inline'; document.getElementById('2003.00284v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2003.00284v2-abstract-full" style="display: none;"> Optical spin angular momenta in a confined electromagnetic field exhibit remarkable difference with their free space counterparts, in particular, the optical transverse spin that is locked with the energy propagating direction lays the foundation for many intriguing physical effects such as unidirectional transportation, quantum spin Hall effect, photonic Skyrmion, etc. In order to investigate the underlying physics behind the spin-orbit interactions as well as to develop the optical spin-based applications, it is crucial to uncover the spin texture in a confined field, yet it faces challenge due to their chiral and near-field vectorial features. Here, we propose a scanning imaging technique which can map the near-field distributions of the optical spin angular momenta with an achiral dielectric nanosphere. The spin angular momentum component normal to the interface can be uncovered experimentally by employing the proposed scanning imaging technique and the three-dimensional spin vector can be reconstructed theoretically with the experimental results. The experiment is demonstrated on the example of surface plasmon polaritons excited by various vector vortex beams under a tight-focusing configuration, where the spin-orbit interaction emerges clearly. The proposed method, which can be utilized to reconstruct the photonic Skyrmion and other photonic topological structures, is straightforward and of high precision, and hence it is expected to be valuable for the study of near-field spin optics and topological photonics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.00284v2-abstract-full').style.display = 'none'; document.getElementById('2003.00284v2-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 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 February, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2002.10615">arXiv:2002.10615</a> <span> [<a href="https://arxiv.org/pdf/2002.10615">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Ghost spintronic THz-emitter-array microscope </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Chen%2C+S">Si-Chao Chen</a>, <a href="/search/physics?searchtype=author&query=Feng%2C+Z">Zheng Feng</a>, <a href="/search/physics?searchtype=author&query=Li%2C+J">Jiang Li</a>, <a href="/search/physics?searchtype=author&query=Tan%2C+W">Wei Tan</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Liang-Hui Du</a>, <a href="/search/physics?searchtype=author&query=Cai%2C+J">Jianwang Cai</a>, <a href="/search/physics?searchtype=author&query=Ma%2C+Y">Yuncan Ma</a>, <a href="/search/physics?searchtype=author&query=He%2C+K">Kang He</a>, <a href="/search/physics?searchtype=author&query=Ding%2C+H">Haifeng Ding</a>, <a href="/search/physics?searchtype=author&query=Zhai%2C+Z">Zhao-Hui Zhai</a>, <a href="/search/physics?searchtype=author&query=Li%2C+Z">Ze-Ren Li</a>, <a href="/search/physics?searchtype=author&query=Qiu%2C+C">Cheng-Wei Qiu</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+X">Xi-Cheng Zhang</a>, <a href="/search/physics?searchtype=author&query=Zhu%2C+L">Li-Guo Zhu</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="2002.10615v1-abstract-short" style="display: inline;"> Terahertz (THz) wave shows great potential in non-destructive testing, bio detection and cancer imaging. Recent progresses on THz wave near-field probes/apertures enable mechanically raster scanning of an object's surface in the near-field region, while an efficient, non-scanning, non-invasive, deeply sub-diffraction-limited imaging still remains challenging. Here, we demonstrate a THz near-field… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2002.10615v1-abstract-full').style.display = 'inline'; document.getElementById('2002.10615v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2002.10615v1-abstract-full" style="display: none;"> Terahertz (THz) wave shows great potential in non-destructive testing, bio detection and cancer imaging. Recent progresses on THz wave near-field probes/apertures enable mechanically raster scanning of an object's surface in the near-field region, while an efficient, non-scanning, non-invasive, deeply sub-diffraction-limited imaging still remains challenging. Here, we demonstrate a THz near-field microscopy using a reconfigurable spintronic THz emitter array (STEA) with computational ghost imaging. By illuminating an object with the reconfigurable STEA in near field and computing the correlation measurements, we reconstruct its image with deeply sub-diffraction resolution. By circulating an external magnetic field, the in-line polarization rotation of THz waves is realized, making the fused image contrast polarization-free. The time-of-flight (TOF) measurements of coherent THz pulses further enables to resolve objects at different distances or depths. The demonstrated ghost spintronic THz-emitter-array microscope (GHOSTEAM) is a new imaging tool for THz near-field real-time imaging (with potential of video framerate), especially opening up paradigm-shift opportunities in non-intrusive label-free bioimaging in a broadband frequency range from 0.1 THz to 30 THz (namely 3.3-1000 cm-1). <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2002.10615v1-abstract-full').style.display = 'none'; document.getElementById('2002.10615v1-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 February, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1911.05159">arXiv:1911.05159</a> <span> [<a href="https://arxiv.org/pdf/1911.05159">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Physics and Society">physics.soc-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Machine Learning">cs.LG</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Machine Learning">stat.ML</span> </div> </div> <p class="title is-5 mathjax"> Coordination Group Formation for OnLine Coordinated Routing Mechanisms </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Peng%2C+W">Wang Peng</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Lili Du</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="1911.05159v1-abstract-short" style="display: inline;"> This study considers that the collective route choices of travelers en route represent a resolution of their competition on network routes. Well understanding this competition and coordinating their route choices help mitigate urban traffic congestion. Even though existing studies have developed such mechanisms (e.g., the CRM [1]), we still lack the quantitative method to evaluate the coordination… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.05159v1-abstract-full').style.display = 'inline'; document.getElementById('1911.05159v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1911.05159v1-abstract-full" style="display: none;"> This study considers that the collective route choices of travelers en route represent a resolution of their competition on network routes. Well understanding this competition and coordinating their route choices help mitigate urban traffic congestion. Even though existing studies have developed such mechanisms (e.g., the CRM [1]), we still lack the quantitative method to evaluate the coordination penitential and identify proper coordination groups (CG) to implement the CRM. Thus, they hit prohibitive computing difficulty when implemented with many opt-in travelers. Motived by this view, this study develops mathematical approaches to quantify the coordination potential between two and among multiple travelers. Next, we develop the adaptive centroid-based clustering algorithm (ACCA), which splits travelers en route in a local network into CGs, each with proper size and strong coordination potential. Moreover, the ACCA is statistically secured to stop at a local optimal clustering solution, which balances the inner-cluster and inter-cluster coordination potential. It can be implemented by parallel computation to accelerate its computing efficiency. Furthermore, we propose a clustering based coordinated routing mechanism (CB-CRM), which implements a CRM on each individual CG. The numerical experiments built upon both Sioux Falls and Hardee city networks show that the ACCA works efficiently to form proper coordination groups so that as compared to the CRM, the CB-CRM significantly improves computation efficiency with minor system performance loss in a large network. This merit becomes more apparent under high penetration and congested traffic condition. Last, the experiments validate the good features of the ACCA as well as the value of implementing parallel computation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.05159v1-abstract-full').style.display = 'none'; document.getElementById('1911.05159v1-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> 12 November, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">24 pages, 15 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/1910.03904">arXiv:1910.03904</a> <span> [<a href="https://arxiv.org/pdf/1910.03904">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Classical Physics">physics.class-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/10.1073/pnas.2018816118">10.1073/pnas.2018816118 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Transverse spin dynamics of light: the generalized spin-momentum locking for structured guided modes </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Shi%2C+P">Peng Shi</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Luping Du</a>, <a href="/search/physics?searchtype=author&query=Li%2C+C">Congcong Li</a>, <a href="/search/physics?searchtype=author&query=Zayats%2C+A+V">Anatoly V. Zayats</a>, <a href="/search/physics?searchtype=author&query=Yuan%2C+X">Xiaocong Yuan</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="1910.03904v2-abstract-short" style="display: inline;"> Quantum spin-Hall effect, a manifestation of topological properties that govern the behavior of surface states, was studied intensively in condensed matter physics resulting in the discovery of topological insulators. The quantum spin-Hall effect of light was introduced for surface plane-waves which intrinsically carry transverse optical spin, leading to many intriguing phenomena and applications… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.03904v2-abstract-full').style.display = 'inline'; document.getElementById('1910.03904v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1910.03904v2-abstract-full" style="display: none;"> Quantum spin-Hall effect, a manifestation of topological properties that govern the behavior of surface states, was studied intensively in condensed matter physics resulting in the discovery of topological insulators. The quantum spin-Hall effect of light was introduced for surface plane-waves which intrinsically carry transverse optical spin, leading to many intriguing phenomena and applications in unidirectional waveguiding, metrology and quantum technologies. In addition to spin, optical waves can exhibit complex topological properties of vectorial electromagnetic fields, associated with orbital angular momentum or nonuniform intensity variations. Here, by considering both spin and angular momentum, we demonstrate a generalized spin-momentum relationship that governs vectorial properties of guided electromagnetic waves, extending optical quantum spin-Hall effect to a two-dimensional vector field of structured guided wave. The effect results in the appearance of the out-of-plane transverse optical spins, which vary progressively from the 'up' state to the 'down' state around the energy flow, and their variation is uniquely locked to the energy propagation direction. The related spin-momentum locking in a chiral spin swirl is demonstrated with four kinds of surface structured waves and proven both theoretically and experimentally. The results provide understanding of the spin dynamics in electromagnetic guided waves and show great importance in spin optics, topological photonics and optical spin-based devices and techniques. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.03904v2-abstract-full').style.display = 'none'; document.getElementById('1910.03904v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 August, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">30 pages; 13 figures; 44 equations; 1 table; 41 references for main text and 45 references for Supplementary Materials</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1908.10433">arXiv:1908.10433</a> <span> [<a href="https://arxiv.org/pdf/1908.10433">pdf</a>, <a href="https://arxiv.org/format/1908.10433">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </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.101.063403">10.1103/PhysRevA.101.063403 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Enhancing the capture velocity of a Dy magneto-optical trap with two-stage slowing </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Lunden%2C+W">William Lunden</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Li Du</a>, <a href="/search/physics?searchtype=author&query=Cantara%2C+M">Michael Cantara</a>, <a href="/search/physics?searchtype=author&query=Barral%2C+P">Pierre Barral</a>, <a href="/search/physics?searchtype=author&query=Jamison%2C+A+O">Alan O. Jamison</a>, <a href="/search/physics?searchtype=author&query=Ketterle%2C+W">Wolfgang Ketterle</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1908.10433v1-abstract-short" style="display: inline;"> Magneto-optical traps (MOTs) based on the $626\;{\rm nm}$, $136\;{\rm kHz}$-wide intercombination line of Dy, which has an attractively low Doppler temperature of $3.3\;渭{\rm K}$, have been implemented in a growing number of experiments over the last several years. A challenge in loading these MOTs comes from their low capture velocities. Slowed atomic beams can spread out significantly during fre… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.10433v1-abstract-full').style.display = 'inline'; document.getElementById('1908.10433v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1908.10433v1-abstract-full" style="display: none;"> Magneto-optical traps (MOTs) based on the $626\;{\rm nm}$, $136\;{\rm kHz}$-wide intercombination line of Dy, which has an attractively low Doppler temperature of $3.3\;渭{\rm K}$, have been implemented in a growing number of experiments over the last several years. A challenge in loading these MOTs comes from their low capture velocities. Slowed atomic beams can spread out significantly during free-flight from the Zeeman slower to the MOT position, reducing the fraction of the beam captured by the MOT. Here we apply, for the first time in a Dy experiment, a scheme for enhancing the loading rate of the MOT wherein atoms are Zeeman-slowed to a final velocity larger than the MOT's capture velocity, and then undergo a final stage of slowing by a pair of near-detuned beams addressing the $421\;{\rm nm}$ transition directly in front of the MOT. By reducing the free-flight time of the Zeeman-slowed atomic beam, we greatly enhance the slowed flux delivered to the MOT, leading to more than an order of magnitude enhancement in the final MOT population. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.10433v1-abstract-full').style.display = 'none'; document.getElementById('1908.10433v1-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> 27 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 3 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 101, 063403 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1906.11181">arXiv:1906.11181</a> <span> [<a href="https://arxiv.org/pdf/1906.11181">pdf</a>, <a href="https://arxiv.org/format/1906.11181">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.cpc.2019.107090">10.1016/j.cpc.2019.107090 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> (3+1)-dimensional dissipative relativistic fluid dynamics at non-zero net baryon density </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Du%2C+L">Lipei Du</a>, <a href="/search/physics?searchtype=author&query=Heinz%2C+U">Ulrich Heinz</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1906.11181v2-abstract-short" style="display: inline;"> Heavy-ion collisions at center-of-mass energies between 1 and 100 GeV/nucleon are essential to understand the phase diagram of QCD and search for its critical point. At these energies the net baryon density of the system can be high, and simulating its evolution becomes an indispensable part of theoretical modeling. We here present the (3+1)-dimensional diffusive relativistic hydrodynamic code BES… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.11181v2-abstract-full').style.display = 'inline'; document.getElementById('1906.11181v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1906.11181v2-abstract-full" style="display: none;"> Heavy-ion collisions at center-of-mass energies between 1 and 100 GeV/nucleon are essential to understand the phase diagram of QCD and search for its critical point. At these energies the net baryon density of the system can be high, and simulating its evolution becomes an indispensable part of theoretical modeling. We here present the (3+1)-dimensional diffusive relativistic hydrodynamic code BEShydro which solves the equations of motion of second-order Denicol-Niemi-Molnar-Rischke (DNMR) theory, including bulk and shear viscous currents and baryon diffusion currents. BEShydro features a modular structure that allows to easily turn on and off baryon evolution and different dissipative effects and thus to study their physical effects on the dynamical evolution individually. An extensive set of test protocols for the code, including several novel tests of the precision of baryon transport that can also be used to test other such codes, is documented here and supplied as a permanent part of the code package. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.11181v2-abstract-full').style.display = 'none'; document.getElementById('1906.11181v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">62 pages, 8 figures; small changes, accepted version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Comput.Phys.Commun. 251 (2020) 107090 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.03041">arXiv:1905.03041</a> <span> [<a href="https://arxiv.org/pdf/1905.03041">pdf</a>, <a href="https://arxiv.org/format/1905.03041">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Social and Information Networks">cs.SI</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Machine Learning">cs.LG</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Physics and Society">physics.soc-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Machine Learning">stat.ML</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/10.1145/3308558.3308558.3313622">10.1145/3308558.3308558.3313622 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Tag2Vec: Learning Tag Representations in Tag Networks </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Wang%2C+J">Junshan Wang</a>, <a href="/search/physics?searchtype=author&query=Lu%2C+Z">Zhicong Lu</a>, <a href="/search/physics?searchtype=author&query=Song%2C+G">Guojie Song</a>, <a href="/search/physics?searchtype=author&query=Fan%2C+Y">Yue Fan</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Lun Du</a>, <a href="/search/physics?searchtype=author&query=Lin%2C+W">Wei Lin</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1905.03041v2-abstract-short" style="display: inline;"> Network embedding is a method to learn low-dimensional representation vectors for nodes in complex networks. In real networks, nodes may have multiple tags but existing methods ignore the abundant semantic and hierarchical information of tags. This information is useful to many network applications and usually very stable. In this paper, we propose a tag representation learning model, Tag2Vec, whi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.03041v2-abstract-full').style.display = 'inline'; document.getElementById('1905.03041v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.03041v2-abstract-full" style="display: none;"> Network embedding is a method to learn low-dimensional representation vectors for nodes in complex networks. In real networks, nodes may have multiple tags but existing methods ignore the abundant semantic and hierarchical information of tags. This information is useful to many network applications and usually very stable. In this paper, we propose a tag representation learning model, Tag2Vec, which mixes nodes and tags into a hybrid network. Firstly, for tag networks, we define semantic distance as the proximity between tags and design a novel strategy, parameterized random walk, to generate context with semantic and hierarchical information of tags adaptively. Then, we propose hyperbolic Skip-gram model to express the complex hierarchical structure better with lower output dimensions. We evaluate our model on the NBER U.S. patent dataset and WordNet dataset. The results show that our model can learn tag representations with rich semantic information and it outperforms other baselines. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.03041v2-abstract-full').style.display = 'none'; document.getElementById('1905.03041v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1812.02827">arXiv:1812.02827</a> <span> [<a href="https://arxiv.org/pdf/1812.02827">pdf</a>, <a href="https://arxiv.org/format/1812.02827">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atmospheric and Oceanic Physics">physics.ao-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Engineering, Finance, and Science">cs.CE</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.energy.2019.03.048">10.1016/j.energy.2019.03.048 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Complementarity Assessment of South Greenland Katabatic Flows and West Europe Wind Regimes </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Radu%2C+D">David Radu</a>, <a href="/search/physics?searchtype=author&query=Berger%2C+M">Mathias Berger</a>, <a href="/search/physics?searchtype=author&query=Fonteneau%2C+R">Rapha毛l Fonteneau</a>, <a href="/search/physics?searchtype=author&query=Hardy%2C+S">Simon Hardy</a>, <a href="/search/physics?searchtype=author&query=Fettweis%2C+X">Xavier Fettweis</a>, <a href="/search/physics?searchtype=author&query=Du%2C+M+L">Marc Le Du</a>, <a href="/search/physics?searchtype=author&query=Panciatici%2C+P">Patrick Panciatici</a>, <a href="/search/physics?searchtype=author&query=Balea%2C+L">Lucian Balea</a>, <a href="/search/physics?searchtype=author&query=Ernst%2C+D">Damien Ernst</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="1812.02827v2-abstract-short" style="display: inline;"> Current global environmental challenges require vigorous and diverse actions in the energy sector. One solution that has recently attracted interest consists in harnessing high-quality variable renewable energy resources in remote locations, while using transmission links to transport the power to end users. In this context, a comparison of western European and Greenland wind regimes is proposed.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.02827v2-abstract-full').style.display = 'inline'; document.getElementById('1812.02827v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1812.02827v2-abstract-full" style="display: none;"> Current global environmental challenges require vigorous and diverse actions in the energy sector. One solution that has recently attracted interest consists in harnessing high-quality variable renewable energy resources in remote locations, while using transmission links to transport the power to end users. In this context, a comparison of western European and Greenland wind regimes is proposed. By leveraging a regional atmospheric model specifically designed to accurately capture polar phenomena, local climatic features of southern Greenland are identified to be particularly conducive to extensive renewable electricity generation from wind. A methodology to assess how connecting remote locations to major demand centres would benefit the latter from a resource availability standpoint is introduced and applied to the aforementioned Europe-Greenland case study, showing superior and complementary wind generation potential in the considered region of Greenland with respect to selected European sites. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.02827v2-abstract-full').style.display = 'none'; document.getElementById('1812.02827v2-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 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 December, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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">Published in Elsevier Energy</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1812.02809">arXiv:1812.02809</a> <span> [<a href="https://arxiv.org/pdf/1812.02809">pdf</a>, <a href="https://arxiv.org/format/1812.02809">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Physics and Society">physics.soc-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Engineering, Finance, and Science">cs.CE</span> </div> </div> <p class="title is-5 mathjax"> Critical Time Windows for Renewable Resource Complementarity Assessment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Berger%2C+M">Mathias Berger</a>, <a href="/search/physics?searchtype=author&query=Radu%2C+D">David Radu</a>, <a href="/search/physics?searchtype=author&query=Fonteneau%2C+R">Raphael Fonteneau</a>, <a href="/search/physics?searchtype=author&query=Henry%2C+R">Robin Henry</a>, <a href="/search/physics?searchtype=author&query=Glavic%2C+M">Mevludin Glavic</a>, <a href="/search/physics?searchtype=author&query=Fettweis%2C+X">Xavier Fettweis</a>, <a href="/search/physics?searchtype=author&query=Du%2C+M+L">Marc Le Du</a>, <a href="/search/physics?searchtype=author&query=Panciatici%2C+P">Patrick Panciatici</a>, <a href="/search/physics?searchtype=author&query=Balea%2C+L">Lucian Balea</a>, <a href="/search/physics?searchtype=author&query=Ernst%2C+D">Damien Ernst</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="1812.02809v1-abstract-short" style="display: inline;"> This paper proposes a systematic framework to assess the complementarity of renewable resources over arbitrary geographical scopes and temporal scales which is particularly well-suited to exploit very large data sets of climatological data. The concept of critical time windows is introduced, and a spatio-temporal criticality indicator is proposed, consisting in a parametrised family of scalar indi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.02809v1-abstract-full').style.display = 'inline'; document.getElementById('1812.02809v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1812.02809v1-abstract-full" style="display: none;"> This paper proposes a systematic framework to assess the complementarity of renewable resources over arbitrary geographical scopes and temporal scales which is particularly well-suited to exploit very large data sets of climatological data. The concept of critical time windows is introduced, and a spatio-temporal criticality indicator is proposed, consisting in a parametrised family of scalar indicators quantifying the complementarity between renewable resources in both space and time. The criticality indicator is leveraged to devise a family of optimisation problems identifying sets of locations with maximum complementarity under arbitrary geographical deployment constraints. The applicability of the framework is shown in a case study investigating the complementarity between the wind regimes in continental western Europe and southern Greenland, and its usefulness in a power system planning context is demonstrated. Besides showing that the occurrence of low wind power production events can be significantly reduced on a regional scale by exploiting diversity in local wind patterns, results highlight the fact that aggregating wind power production sites located on different continents may result in a lower occurrence of system-wide low wind power production events and indicate potential benefits of intercontinental electrical interconnections. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.02809v1-abstract-full').style.display = 'none'; document.getElementById('1812.02809v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 December, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2018. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1806.09271">arXiv:1806.09271</a> <span> [<a href="https://arxiv.org/pdf/1806.09271">pdf</a>, <a href="https://arxiv.org/ps/1806.09271">ps</a>, <a href="https://arxiv.org/format/1806.09271">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Classical Physics">physics.class-ph</span> </div> </div> <p class="title is-5 mathjax"> Comment on "A Nonholonomic Model of the Paul Trap" </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Fan%2C+W">Wenkai Fan</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Li Du</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+S">Sihui Wang</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="1806.09271v2-abstract-short" style="display: inline;"> A recent article by Borisov et al. [Regular and Chaotic Dynamics 23.3 (2018): 339-354.] studies the motion of a rigid ball in a rotating-saddle trap. The authors claim that they derive a new equation of motion from the Lagrangian formalism, which is different from the one we obtained from the Newtonian formalism in our recent work [American Journal of Physics 85.11 (2017): 821-829.]. We show here… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.09271v2-abstract-full').style.display = 'inline'; document.getElementById('1806.09271v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1806.09271v2-abstract-full" style="display: none;"> A recent article by Borisov et al. [Regular and Chaotic Dynamics 23.3 (2018): 339-354.] studies the motion of a rigid ball in a rotating-saddle trap. The authors claim that they derive a new equation of motion from the Lagrangian formalism, which is different from the one we obtained from the Newtonian formalism in our recent work [American Journal of Physics 85.11 (2017): 821-829.]. We show here that these two equations of motion are the same. In addition, besides the reduced spin frequency and the moment of inertia coefficient, the stability condition given by the article is independent of the ball radius---this result is incorrect. The mistake is due to the fact that the center of mass and the contact point are not distinguished in the explicit expression of the local normal vector. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.09271v2-abstract-full').style.display = 'none'; document.getElementById('1806.09271v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 June, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 June, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2018. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1806.04827">arXiv:1806.04827</a> <span> [<a href="https://arxiv.org/pdf/1806.04827">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41567-019-0487-7">10.1038/s41567-019-0487-7 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Deep-subwavelength features of photonic skyrmions in a confined electromagnetic field with orbital angular momentum </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Du%2C+L">Luping Du</a>, <a href="/search/physics?searchtype=author&query=Yang%2C+A">Aiping Yang</a>, <a href="/search/physics?searchtype=author&query=Zayats%2C+A+V">Anatoly V. Zayats</a>, <a href="/search/physics?searchtype=author&query=Yuan%2C+X">Xiaocong Yuan</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="1806.04827v1-abstract-short" style="display: inline;"> In magnetic materials, skyrmions are nanoscale regions where the orientation of electron spin changes in a vortex-type manner. Here we show that spin-orbit coupling in a focused vector beam results in a skyrmion-like photonic spin distribution of the excited waveguided fields. While diffraction limits the spatial size of intensity distributions, the direction of the field, defining photonic spin,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.04827v1-abstract-full').style.display = 'inline'; document.getElementById('1806.04827v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1806.04827v1-abstract-full" style="display: none;"> In magnetic materials, skyrmions are nanoscale regions where the orientation of electron spin changes in a vortex-type manner. Here we show that spin-orbit coupling in a focused vector beam results in a skyrmion-like photonic spin distribution of the excited waveguided fields. While diffraction limits the spatial size of intensity distributions, the direction of the field, defining photonic spin, is not subject to this limitation. We demonstrate that the skyrmion spin structure varies on the deep-subwavelength scales down to 1/60 of light wavelength, which corresponds to about 10 nanometre lengthscale. The application of photonic skyrmions may range from high-resolution imaging and precision metrology to quantum technologies and data storage where the spin structure of the field, not its intensity, can be applied to achieve deep-subwavelength optical patterns. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.04827v1-abstract-full').style.display = 'none'; document.getElementById('1806.04827v1-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> 12 June, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2018. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1804.04939">arXiv:1804.04939</a> <span> [<a href="https://arxiv.org/pdf/1804.04939">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Disordered Systems and Neural Networks">cond-mat.dis-nn</span> </div> </div> <p class="title is-5 mathjax"> Electronic Structure Topology Associated Domain is Useful to Minimize the Uncertainty of QM/MM Boundary Charge Transfer Effects </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Yang%2C+J">Jiajun Yang</a>, <a href="/search/physics?searchtype=author&query=Liu%2C+F">Fang Liu</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+D">Dongju Zhang</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Likai Du</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="1804.04939v2-abstract-short" style="display: inline;"> The charge transfer effect is an important component in the physical description of realistic proteins. In the hybrid quantum mechanical-molecular mechanical (QM/MM) simulations, the significant charge transfer between the QM/MM boundaries could lead to the slow convergence problem with very large QM regions. In this work, we will discuss how community structure in complex network (electronic stru… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.04939v2-abstract-full').style.display = 'inline'; document.getElementById('1804.04939v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1804.04939v2-abstract-full" style="display: none;"> The charge transfer effect is an important component in the physical description of realistic proteins. In the hybrid quantum mechanical-molecular mechanical (QM/MM) simulations, the significant charge transfer between the QM/MM boundaries could lead to the slow convergence problem with very large QM regions. In this work, we will discuss how community structure in complex network (electronic structure topology associated domain) can be used to measure QM/MM boundary effects and how it can provide a different perspective on well established concepts in available QM/MM simulations. The graph theory is employed to provide an useful solution to distinguish the significant charge transfer regions between the core active site and the surrounding protein environment in the QM/MM simulations. According to community detection algorithm for complex network, the charge transfer topology associated domain (ctTAD) is suggested to provide an alternative tool for systematically minimizing the charge transfer effects of QM/MM boundary with minor computational costs. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.04939v2-abstract-full').style.display = 'none'; document.getElementById('1804.04939v2-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> 1 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 April, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 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">32 pages, 11 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/1802.10358">arXiv:1802.10358</a> <span> [<a href="https://arxiv.org/pdf/1802.10358">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Biological Physics">physics.bio-ph</span> </div> </div> <p class="title is-5 mathjax"> Charge Transfer in Classical Molecular Dynamics Simulations of Met-enkephalin: Improving Traditional Force Field with Data Driven Models </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Dong%2C+T">Tiange Dong</a>, <a href="/search/physics?searchtype=author&query=Liu%2C+F">Fang Liu</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Likai Du</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+D">Dongju Zhang</a>, <a href="/search/physics?searchtype=author&query=Gao%2C+J">Jun Gao</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="1802.10358v1-abstract-short" style="display: inline;"> The charge transfer and polarization effects are important components in the molecular mechanism description of bio-molecules. Classical force field with fixed point charge cannot take into the account of the non-negligible correlation between atomic charge and structure changes. In this work, high throughput ab initio calculations for the pentapeptide Met-enkephalin (MetEnk) reveal that geometric… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.10358v1-abstract-full').style.display = 'inline'; document.getElementById('1802.10358v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1802.10358v1-abstract-full" style="display: none;"> The charge transfer and polarization effects are important components in the molecular mechanism description of bio-molecules. Classical force field with fixed point charge cannot take into the account of the non-negligible correlation between atomic charge and structure changes. In this work, high throughput ab initio calculations for the pentapeptide Met-enkephalin (MetEnk) reveal that geometric dependent charge transfer among residues is significant among tens of thousands of conformations. And we suggest a data driven model with machine learning algorithms to solve the geometric dependent charge fluctuations problem. This data driven model can directly provide ab initio level atomic charges of any structure for MetEnk, and avoids self-consistent iteration in polarizable force field. Molecular dynamics simulations demonstrated that the data driven model provides a possible choice to describe the explicit charge flux with minor modification of available classical force fields. This work provides us an alternative molecular mechanism model for future dynamics simulation of oligopeptides. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.10358v1-abstract-full').style.display = 'none'; document.getElementById('1802.10358v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 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">Comments:</span> <span class="has-text-grey-dark mathjax">24 pages, 11 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/1802.07873">arXiv:1802.07873</a> <span> [<a href="https://arxiv.org/pdf/1802.07873">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Soft Condensed Matter">cond-mat.soft</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acsomega.8b00336">10.1021/acsomega.8b00336 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Charge Transfer Database for Bio-molecule Tight Binding Model Derived from Thousands of Proteins </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Wang%2C+H">Hongwei Wang</a>, <a href="/search/physics?searchtype=author&query=Liu%2C+F">Fang Liu</a>, <a href="/search/physics?searchtype=author&query=Dong%2C+T">Tiange Dong</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Likai Du</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+D">Dongju Zhang</a>, <a href="/search/physics?searchtype=author&query=Gao%2C+J">Jun Gao</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="1802.07873v1-abstract-short" style="display: inline;"> The anisotropic feature of charge transfer reactions in realistic proteins cannot be ignored, due to the highly complex chemical structure of bio-molecules. In this work, we have performed the first large-scale quantitative assessment of charge transfer preference in protein complexes by calculating the charge transfer couplings in all 20*20 possible amino acid side chain combinations, which are e… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.07873v1-abstract-full').style.display = 'inline'; document.getElementById('1802.07873v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1802.07873v1-abstract-full" style="display: none;"> The anisotropic feature of charge transfer reactions in realistic proteins cannot be ignored, due to the highly complex chemical structure of bio-molecules. In this work, we have performed the first large-scale quantitative assessment of charge transfer preference in protein complexes by calculating the charge transfer couplings in all 20*20 possible amino acid side chain combinations, which are extracted from available high-quality structures of thousands of protein complexes. The charge transfer database quantitatively shows distinct features of charge transfer couplings among millions of amino acid side-chains combinations. The knowledge graph of charge transfer couplings reveals that only one average or representative structure cannot be regarded as the typical charge transfer preference in realistic proteins. This data driven model provides us an alternative route to comprehensively understand the pairwise charge transfer coupling parameters based structural similarity, without any require of the knowledge of chemical intuition about the chemical interactions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.07873v1-abstract-full').style.display = 'none'; document.getElementById('1802.07873v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 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">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> ACS Omega, 2018, 3 (4), pp 4094 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1802.05192">arXiv:1802.05192</a> <span> [<a href="https://arxiv.org/pdf/1802.05192">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Soft Condensed Matter">cond-mat.soft</span> </div> </div> <p class="title is-5 mathjax"> Data Driven Charge Transfer Atlas Provides Topological View of Electronic Structure Properties for Arbitrary Proteins Complexes </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Liu%2C+F">Fang Liu</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+H">Hongwei Wang</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+D">Dongju Zhang</a>, <a href="/search/physics?searchtype=author&query=Du%2C+L">Likai Du</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="1802.05192v2-abstract-short" style="display: inline;"> Due to the highly complex chemical structure of biomolecules, the extensive understanding of the electronic information for proteomics can be challenging. Here, we constructed a charge transfer database at residue level derived from millions of electronic structure calculations among 20x20 possible amino acid side-chains combinations, which were extracted from available high-quality structures of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.05192v2-abstract-full').style.display = 'inline'; document.getElementById('1802.05192v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1802.05192v2-abstract-full" style="display: none;"> Due to the highly complex chemical structure of biomolecules, the extensive understanding of the electronic information for proteomics can be challenging. Here, we constructed a charge transfer database at residue level derived from millions of electronic structure calculations among 20x20 possible amino acid side-chains combinations, which were extracted from available high-quality structures of thousands of protein complexes. Then, the data driven network (D2Net) analysis was proposed to quickly identify the critical residue or residue groups for any possible protein complex. As an initial evaluation, we applied this model to scrutinize the charge transfer networks for two randomly selected proteins, which highlighted the most critical residues with large node degrees as network hubs. This work may provide us a promising computional protocol for topologically understanding the electronic structure information in the growing number of high-quality experimental proteins structures, with minor computational costs. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.05192v2-abstract-full').style.display = 'none'; document.getElementById('1802.05192v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 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">Comments:</span> <span class="has-text-grey-dark mathjax">36 pages, 9 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1801.04547">arXiv:1801.04547</a> <span> [<a href="https://arxiv.org/pdf/1801.04547">pdf</a>, <a href="https://arxiv.org/ps/1801.04547">ps</a>, <a href="https://arxiv.org/format/1801.04547">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/10.1038/s41598-020-58018-2">10.1038/s41598-020-58018-2 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Controllable unidirectional transport and photon storage in an one-dimensional lattice with complex hopping rates </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Du%2C+L">Lei Du</a>, <a href="/search/physics?searchtype=author&query=Zhang%2C+Y">Yan Zhang</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="1801.04547v2-abstract-short" style="display: inline;"> We study an one-dimensional non-Hermitian lattice with complex hopping rates, which can be realized by a quasi-one-dimensional sawtooth-type Hermitian lattice after adiabatic elimination with proper conditions. By means of synthetic magnetic fluxes, the imaginary parts of the complex hopping rates can be modulated by additional phase, thus a non-reciprocal structure arises. With this lattice, one… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1801.04547v2-abstract-full').style.display = 'inline'; document.getElementById('1801.04547v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1801.04547v2-abstract-full" style="display: none;"> We study an one-dimensional non-Hermitian lattice with complex hopping rates, which can be realized by a quasi-one-dimensional sawtooth-type Hermitian lattice after adiabatic elimination with proper conditions. By means of synthetic magnetic fluxes, the imaginary parts of the complex hopping rates can be modulated by additional phase, thus a non-reciprocal structure arises. With this lattice, one can realize robust unidirectional transport for both single-site and Gaussian excitations, which is immune to defects and backscattering. Furthermore, we proposed a sandwich structure based on the non-Hermitian lattice, which can be used for realizing controllable photon storage and reversal. The storage time and range can be artificially controlled within limits, and the storage efficiency can be increased via a finite gain compensation. The proposal of controllable photon transport in this paper opens up a new path for unidirectional photon transport and provides a promising platform for optical control and manipulation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1801.04547v2-abstract-full').style.display = 'none'; document.getElementById('1801.04547v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 January, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 January, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">7 pages, 7 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Scientific Reports 10, 1113 (2020) </p> </li> </ol> <nav class="pagination is-small is-centered breathe-horizontal" role="navigation" aria-label="pagination"> <a href="" class="pagination-previous is-invisible">Previous </a> <a href="/search/?searchtype=author&query=Du%2C+L&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Du%2C+L&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Du%2C+L&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> </ul> </nav> <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>

CINXE.COM

Search | arXiv e-print repository