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itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem" class="active" ><span itemprop="name">Home</span> <meta itemprop="position" content="2"> </li> </ul> </nav> <div id="system-message-container" aria-live="polite"></div> <section class="blog-featured"> <div class="items-leading clearfix"> <div class="leading-0 clearfix"> <div><div class="moduletable "> <div id="news"> <h2> News <small class="pull-right"> <a class="link-icon" href="/de/aktuelles/news" >Alle News</a> </small> </h2> <div class="row"> <div class="col-md-3 newsitem newsitem-row-1"> <div class="news-image"> <a class="mod-articles-category-title " href="/de/aktuelles/news/991-quanten-simulatoren-wenn-die-natur-ihre-naturgesetze-verraet"> <img src="/images/news/2025/thumbnails/quantensimulator_thumb.jpg#joomlaImage://local-images/news/2025/thumbnails/quantensimulator_thumb.jpg?width=354&height=236" alt="Illustration: Oliver Diekmann/TU Wien" /></a> </div> <div class="news-text"> <h3>Quanten-Simulatoren: Wenn die Natur ihre Naturgesetze verrät</h3> <span class="newstitle"> Quanten-Simulatoren sind ein völlig neues Werkzeug für die Forschung: Man erklärt Quantenphysik durch... </span> <span class="read_more"> <a class="link-icon mod-articles-category-title " href="/de/aktuelles/news/991-quanten-simulatoren-wenn-die-natur-ihre-naturgesetze-verraet"> Ganzen Artikel lesen </a> </span> </div> </div> <div class="col-md-3 newsitem newsitem-row-2"> <div class="news-image"> <a class="mod-articles-category-title " href="/de/aktuelles/news/989-drittes-ehrendoktorat-fuer-peter-zoller"> <img src="/images/news/2024/thumbnails/ceremonia_thumb.jpg#joomlaImage://local-images/news/2024/thumbnails/ceremonia_thumb.jpg?width=354&height=236" alt="Foto: Esteban Paredes Drake " /></a> </div> <div class="news-text"> <h3>Drittes Ehrendoktorat für Peter Zoller</h3> <span class="newstitle"> Die Universität von Concepción in Chile hat dem Quantenphysiker Peter Zoller für seine... </span> <span class="read_more"> <a class="link-icon mod-articles-category-title " href="/de/aktuelles/news/989-drittes-ehrendoktorat-fuer-peter-zoller"> Ganzen Artikel lesen </a> </span> </div> </div> <div class="col-md-3 newsitem newsitem-row-3"> <div class="news-image"> <a class="mod-articles-category-title " href="/de/aktuelles/news/985-komplexe-atome-in-optischen-pinzetten"> <img src="/images/news/2024/erbium-trap.jpg#joomlaImage://local-images/news/2024/erbium-trap.jpg?width=2659&height=1761" alt="" /></a> </div> <div class="news-text"> <h3>Komplexe Atome in optischen Pinzetten</h3> <span class="newstitle"> Ein Team um die Experimentalphysikerin Francesca Ferlaino hat einen neuen Meilenstein in der... </span> <span class="read_more"> <a class="link-icon mod-articles-category-title " href="/de/aktuelles/news/985-komplexe-atome-in-optischen-pinzetten"> Ganzen Artikel lesen </a> </span> </div> </div> <div class="col-md-3 newsitem newsitem-row-4"> <div class="news-image"> <a class="mod-articles-category-title " href="/de/aktuelles/news/981-drei-unter-den-meist-zi-tier-ten"> <img src="/images/news/2024/thumbnails/pichler-hannes-thumb.jpg#joomlaImage://local-images/news/2024/thumbnails/pichler-hannes-thumb.jpg?width=354&height=236" alt="" /></a> </div> <div class="news-text"> <h3>Drei unter den Meistzitierten</h3> <span class="newstitle"> Drei Forscher des Instituts für Quantenoptik und Quanteninformation (IQOQI) sind in diesem Jahr... </span> <span class="read_more"> <a class="link-icon mod-articles-category-title " href="/de/aktuelles/news/981-drei-unter-den-meist-zi-tier-ten"> Ganzen Artikel lesen </a> </span> </div> </div> </div> </div></div> <div class="moduletable -home"> <h2 class="weblinks-home-header">In the News</h2> <div class="row weblinks-home"> <div class="col-md-6"> <h3> <a href="/de/component/weblinks/?task=weblink.go&catid=38:in-the-news&id=161:nature-h-jeffrey-kimble-1949-2024&Itemid=105" target="_blank" rel="follow">Nature: H. Jeffrey Kimble (1949–2024)</a> </h3> Champion experimentalist of quantum optics and squeezed-light pioneer has sadly passed away. </div> <div class="col-md-6"> <h3> <a href="/de/component/weblinks/?task=weblink.go&catid=38:in-the-news&id=159:quanta-physicists-spot-quantum-tornadoes-twirling-in-a-supersolid&Itemid=105" target="_blank" rel="follow">Quanta: Physicists Spot Quantum Tornadoes Twirling in a ‘Supersolid'</a> </h3> New observations of microscopic vortices confirm the existence of a paradoxical phase of matter that may also arise inside neutron stars. </div> </div> </div> </div> </div> </div> <article class="items-row row cols-1 row-0"> <div class="item column-1 col-md-12"> <div><div class="moduletable researchgroups"> <h2 >Forschungsgruppen</h2> <div class="row"> <div class="col-sm-12 col-lg-6 "> <h3 style="margin-top: 1rem;">Dipolare Quantengase</h3> <div class="row"> <div class="col-md-3"> <figure class="left item-image"> <img src="/images/wds/ferlaino_francesca.jpg" alt="Foto of Francesca Ferlaino" /> </figure> </div> <div class="col-md-9"> Die Forschungsgruppe um Francesca Ferlaino beschäftigt sich mit dipolaren Quantenphänomenen, wofür sie stark magnetische Atomspezies verwendet. So konnte die Gruppe im Jahr 2012 das erste... <a class="mod-articles-category-title link-icon" style="display: block; margin-top: .5rem;" href="/de/forschung/forschungsgruppen/745-dipolare-quantengase" >Read more …</a> </div> </div> </div> <div class="col-sm-12 col-lg-6 "> <h3 style="margin-top: 1rem;">Ultrakalte Atome und Quantengase</h3> <div class="row"> <div class="col-md-3"> <figure class="left item-image"> <img src="/images/wds/grimm_rudolf.jpg" alt="Foto of Rudolf Grimm" /> </figure> </div> <div class="col-md-9"> Die Arbeitsgruppe unter der Leitung von Rudolf Grimm untersucht ultrakalte Teilchensysteme, bestehend aus optisch gespeicherten Quantengasen sehr nahe am absoluten Nullpunkt. Solche Systeme... <a class="mod-articles-category-title link-icon" style="display: block; margin-top: .5rem;" href="/de/forschung/forschungsgruppen/748-ultrakalte-atome-und-quantengase" >Read more …</a> </div> </div> </div> <div class="col-sm-12 col-lg-6 "> <h3 style="margin-top: 1rem;">Supraleitende Quantenschaltkreise</h3> <div class="row"> <div class="col-md-3"> <figure class="left item-image"> <img src="/images/wds/kirchmair_gerhard.jpg" alt="Foto of Gerhard Kirchmair" /> </figure> </div> <div class="col-md-9"> Die Forschungsgruppe um Gerhard Kirchmair arbeitet an supraleitenden Schaltkreisen und deren Anwendung in der Quanteninformationsverarbeitung und Quantensimulation. Die quantenmechanischen... <a class="mod-articles-category-title link-icon" style="display: block; margin-top: .5rem;" href="/de/forschung/forschungsgruppen/749-supraleitende-quantenschaltkreise" >Read more …</a> </div> </div> </div> <div class="col-sm-12 col-lg-6 "> <h3 style="margin-top: 1rem;">Quantenoptik und Vielteilchenphysik</h3> <div class="row"> <div class="col-md-3"> <figure class="left item-image"> <img src="/images/wds/pichler_hannes.jpg" alt="Foto of Hannes Pichler" /> </figure> </div> <div class="col-md-9"> Die Forschungsgruppe unter der Leitung von Hannes Pichler beschäftigt sich mit quantenoptischen Systemen, Quanten-Vielteilchenphysik und Quanteninformation. Ziel der Gruppe ist es, die theoretischen Grundlagen... <a class="mod-articles-category-title link-icon" style="display: block; margin-top: .5rem;" href="/de/forschung/forschungsgruppen/751-quantenoptik-und-vielteilchenphysik" >Read more …</a> </div> </div> </div> </div> </div> </div> <div><div class="moduletable researchgroups"> <h2 >Emeritus Forschungsgruppen</h2> <div class="row"> <div class="col-sm-12 col-lg-6 "> <h3 style="margin-top: 1rem;">Quantenoptik und Spektroskopie</h3> <div class="row"> <div class="col-md-3"> <figure class="left item-image"> <img src="/images/wds/blatt_rainer.jpg" alt="Foto of Rainer Blatt" /> </figure> </div> <div class="col-md-9"> Die Forschungsgruppe um Rainer Blatt untersucht quantenphysikalische Prozesse an Ionen, die in Ionenfallen gespeichert sind. Ziel der Experimente ist es, eine möglichst vollständige Kontrolle über... <a class="mod-articles-category-title link-icon" style="display: block; margin-top: .5rem;" href="/de/forschung/emeritus-forschungsgruppen/747-quantenoptik-und-spektroskopie" >Read more …</a> </div> </div> </div> <div class="col-sm-12 col-lg-6 "> <h3 style="margin-top: 1rem;">Quantenoptik und Quanteninformation</h3> <div class="row"> <div class="col-md-3"> <figure class="left item-image"> <img src="/images/wds/zoller_peter.jpg" alt="Foto of Peter Zoller" /> </figure> </div> <div class="col-md-9"> Peter Zoller's Forschungsarbeiten sind auf den Gebieten der theoretischen Quantenoptik und Atomphysik, der Quanteninformation und der Theorie kondensierter Materie angesiedelt. Im Vordergrund steht... <a class="mod-articles-category-title link-icon" style="display: block; margin-top: .5rem;" href="/de/forschung/emeritus-forschungsgruppen/746-quantenoptik-und-quanteninformation" >Read more …</a> </div> </div> </div> </div> </div> </div> <div class="row mostrecent-preprints"> <div class="col-lg-12"><h2 class="">Aktuellste Preprints</h2><article> <div class="reference" id="latest-preprint-721357"> <span class="title"> Coherent control over the high-dimensional space of the nuclear spin of alkaline-earth atoms </span> <span class="author"> H. Ahmed, A. Litvinov, P. Guesdon, E. Maréchal, J. Huckans, B. Pasquiou, B. Laburthe-Tolra, M. Robert-de-Saint-Vincent </span> <a href="https://arxiv.org/abs/2501.01731">arXiv:2501.01731</a> <a class="toggle-abstract toggle-icon collapsed" role="button" data-toggle="collapse" href="#latest-preprint-abstract-721357" aria-expanded="false" aria-controls="latest-preprint-abstract-721357" >Show Abstract</a> <div id="latest-preprint-abstract-721357" class="collapse"> <div class="abstract">We demonstrate coherent manipulation of the nuclear degrees of freedom of ultracold ground-state strontium 87 atoms, thus providing a toolkit for fully exploiting the corresponding large Hilbert space as a quantum resource and for quantum simulation experiments with SU(N)-symmetric matter. By controlling the resonance conditions of Raman transitions with a tensor light shift, we can perform rotations within a restricted Hilbert space of two isolated spin states among the 2F+1 = 10 possible states. These manipulations correspond to engineering unitary operations deriving from generators of the SU(N) algebra beyond what can be done by simple spin precession. We present Ramsey interferometers involving an isolated pair of Zeeman states with no measurable decoherence after 3 seconds. We also demonstrate that one can harvest the large spin degrees of freedom as a qudit resource by implementing two interferometer schemes over four states. The first scheme senses in parallel multiple external fields acting on the atoms, and the second scheme simultaneously measures multiple observables of a collective atomic state - including non-commuting ones. Engineering unitary transformations of the large spin driven by other generators than the usual spin-F representation of the SU(2) group offers new possibilities from the point of view of quantum metrology and quantum many-body physics, notably for the quantum simulation of large-spin SU(N)-symmetric quantum magnetism with fermionic alkaline-earth atoms. </div> </div> </div> <div class="reference" id="latest-preprint-721335"> <span class="title"> Synchronization in rotating supersolids </span> <span class="author"> E. Poli, A. Litvinov, E. Casotti, C. Ulm, L. Klaus, M. J. Mark, G. Lamporesi, T. Bland, F. Ferlaino </span> <a href="https://arxiv.org/abs/2412.11976">arXiv:2412.11976</a> <a class="toggle-abstract toggle-icon collapsed" role="button" data-toggle="collapse" href="#latest-preprint-abstract-721335" aria-expanded="false" aria-controls="latest-preprint-abstract-721335" >Show Abstract</a> <div id="latest-preprint-abstract-721335" class="collapse"> <div class="abstract">Synchronization is ubiquitous in nature at various scales and fields. This phenomenon not only offers a window into the intrinsic harmony of complex systems, but also serves as a robust probe for many-body quantum systems. One such system is a supersolid: an exotic state that is simultaneously superfluid and solid. Here, we show that putting a supersolid under rotation leads to a synchronization of the crystal&#039;s motion to an external driving frequency triggered by quantum vortex nucleation, revealing the system&#039;s dual solid-superfluid response. Benchmarking the theoretical framework against experimental observations, we exploit this model as a novel method to investigate the critical frequency required for vortex nucleation. Our results underscore the utility of synchronization as a powerful probe for quantum systems.</div> </div> </div> <div class="reference" id="latest-preprint-721277"> <span class="title"> Kerr enhanced optomechanical cooling in the unresolved sideband regime </span> <span class="author"> N. Diaz-Naufal, L. Deeg, D. Zoepfl, C. Schneider, M. L. Juan, G. Kirchmair, A. Metelmann </span> <a href="https://arxiv.org/abs/2410.15435">arXiv:2410.15435</a> </div> <div class="reference" id="latest-preprint-721389"> <span class="title"> Error-corrected fermionic quantum processors with neutral atoms </span> <span class="author"> R. Ott, D. González-Cuadra, T. Zache, P. Zoller, A. Kaufman, H. Pichler </span> <a href="https://arxiv.org/abs/2412.16081">arXiv:2412.16081</a> <a class="toggle-abstract toggle-icon collapsed" role="button" data-toggle="collapse" href="#latest-preprint-abstract-721389" aria-expanded="false" aria-controls="latest-preprint-abstract-721389" >Show Abstract</a> <div id="latest-preprint-abstract-721389" class="collapse"> <div class="abstract">Many-body fermionic systems can be simulated in a hardware-efficient manner using a fermionic quantum processor. Neutral atoms trapped in optical potentials can realize such processors, where non-local fermionic statistics are guaranteed at the hardware level. Implementing quantum error correction in this setup is however challenging, due to the atom-number superselection present in atomic systems, that is, the impossibility of creating coherent superpositions of different particle numbers. In this work, we overcome this constraint and present a blueprint for an error-corrected fermionic quantum computer that can be implemented using current experimental capabilities. To achieve this, we first consider an ancillary set of fermionic modes and design a fermionic reference, which we then use to construct superpositions of different numbers of referenced fermions. This allows us to build logical fermionic modes that can be error corrected using standard atomic operations. Here, we focus on phase errors, which we expect to be a dominant source of errors in neutral-atom quantum processors. We then construct logical fermionic gates, and show their implementation for the logical particle-number conserving processes relevant for quantum simulation. Finally, our protocol is illustrated using a minimal fermionic circuit, where it leads to a quadratic suppression of the logical error rate. </div> </div> </div> <div class="reference" id="latest-preprint-721419"> <span class="title"> Measuring full counting statistics in a quantum simulator </span> <span class="author"> L. K. Joshi, F. Ares, M. K. Joshi, C. F. Roos, P. Calabrese </span> <a href="https://arxiv.org/abs/2501.14424">arXiv:2501.14424</a> <a class="toggle-abstract toggle-icon collapsed" role="button" data-toggle="collapse" href="#latest-preprint-abstract-721419" aria-expanded="false" aria-controls="latest-preprint-abstract-721419" >Show Abstract</a> <div id="latest-preprint-abstract-721419" class="collapse"> <div class="abstract">In quantum mechanics, the probability distribution function (PDF) and full counting statistics (FCS) play a fundamental role in characterizing the fluctuations of quantum observables, as they encode the complete information about these fluctuations. In this letter, we measure these two quantities in a trapped-ion quantum simulator for the transverse and longitudinal magnetization within a subsystem. We utilize the toolbox of classical shadows to postprocess the measurements performed in random bases. The measurement scheme efficiently allows access to the FCS and PDF of all possible operators on desired choices of subsystems of an extended quantum system.</div> </div> </div> <div class="reference" id="latest-preprint-721388"> <span class="title"> Derandomized shallow shadows: Efficient Pauli learning with bounded-depth circuits </span> <span class="author"> K. Van Kirk, C. Kokail, J. Kunjummen, H. Hu, Y. Teng, M. Cain, J. Taylor, S. F. Yelin, H. Pichler, M. Lukin </span> <a href="https://arxiv.org/abs/2412.18973">arXiv:2412.18973</a> <a class="toggle-abstract toggle-icon collapsed" role="button" data-toggle="collapse" href="#latest-preprint-abstract-721388" aria-expanded="false" aria-controls="latest-preprint-abstract-721388" >Show Abstract</a> <div id="latest-preprint-abstract-721388" class="collapse"> <div class="abstract">Efficiently estimating large numbers of non-commuting observables is an important subroutine of many quantum science tasks. We present the derandomized shallow shadows (DSS) algorithm for efficiently learning a large set of non-commuting observables, using shallow circuits to rotate into measurement bases. Exploiting tensor network techniques to ensure polynomial scaling of classical resources, our algorithm outputs a set of shallow measurement circuits that approximately minimizes the sample complexity of estimating a given set of Pauli strings. We numerically demonstrate systematic improvement, in comparison with state-of-the-art techniques, for energy estimation of quantum chemistry benchmarks and verification of quantum many-body systems, and we observe DSS&#039;s performance consistently improves as one allows deeper measurement circuits. These results indicate that in addition to being an efficient, low-depth, stand-alone algorithm, DSS can also benefit many larger quantum algorithms requiring estimation of multiple non-commuting observables. </div> </div> </div> <a class="link-icon" href="/./preprints-iqoqi">Mehr Preprints</a> <br/> <a class="link-icon" href="/./publications-iqoqi">Alle Publikationen</a> </article></div> </div> <div></div> </div> </article> </section> </div> </div> </div> <footer> <div class="container"> <div class="footer-main row"> <div class="col-md-3"> <div class="osmodul" id="map189"></div> <script>document.addEventListener("DOMContentLoaded", function(){var map189 = new L.Map('map189', {dragging: false, boxZoom: false, tap: false}); map189.attributionControl.setPrefix(''); var baselayer189 = new L.TileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {maxZoom: 19, noWrap: false, attribution: '<a href="https://www.openstreetmap.org/copyright" target="_blank">© OpenStreetMap contributors</a>'}); var koord189 = new L.LatLng(47.263571, 11.345729); L.control.scale({metric:true,imperial:false}).addTo(map189); map189.attributionControl.addAttribution('Powered by Leaflet'); var marker189 = new L.Marker(koord189); map189.addLayer(marker189); // set map view map189.setView(koord189, 17).addLayer(baselayer189); // additional Pins ; });</script> </div> <div class="col-md-3"> <div class="custom " > <p>Institut für Quantenoptik und Quanteninformation - Innsbruck<br>der Österreichischen Akademie der Wissenschaften<br><br> Technikerstraße 21a<br> 6020 Innsbruck, Austria</p> <hr> <p>Telefon +43 512 507 47100<br><joomla-hidden-mail is-link="1" is-email="1" first="aXFvcWktaWJr" last="b2Vhdy5hYy5hdA==" text="aXFvcWktaWJrQG9lYXcuYWMuYXQ=" base="" >Diese E-Mail-Adresse ist vor Spambots geschützt! 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