Quantum machine learning for supersymmetry searches

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data-history-node-id="690" class="layout layout--onecol"> <div class="layout__region layout__region--content"> <div class="field field--name-field-component field--type-entity-reference-revisions field--label-hidden field--items"> <div class="field--item"> <div class="component-row component-row__display__fluid section-navigation effect_none is_half_height"> <div class="component-row__row"> <div class="component-row__column component-row__center section-has-no-column col-md-12 col-sm-12 col-xs-12"> <div class="box-effects-wrapper "> <div class="cern-component-header-blocks component-header"> <div id="header-blocks--2" class="owl-carousel owl-theme component-header__carousel header-carousel"> <div class="header-block"> <div class="header-block__title"> <h3 class="header-block__name" style="color:#FFFFFF;"> <span style="color:#FFFFFF;"> <p>Quantum machine learning for supersymmetry searches</p> </span> <span style="background:#FFFFFF;" class="header-block__name__underline"></span> </h3> </div> <div class="background-component background__image" style="background:url('/sites/default/files/2021-09/Quantum%20computing_0.jpeg') no-repeat center top / cover; height: 100%;"></div> </div> </div> </div> <a class="endof-cern-header-blocks"></a> </div> </div> </div> </div> </div> <div class="field--item"> <div class="component-row component-row__display__fluidcenter section-navigation effect_background_rotation"> <div class="background-component background__image" style="background:url('/sites/default/files/2021-09/Untitled%20design%20%282%29_0.png') no-repeat center top / cover; height: 100%;"></div> <div class="component-row__row"> <div class="component-row__column component-row__center section-has-no-column col-md-9 col-sm-12 col-xs-12"> <div class="box-effects-wrapper "> <div class="text-component text-component-page clearfix"> <div class="text-component-text cern_full_html"> <p><span style="font-size:24px;"></span><span style="font-size:24px;"></span><br> <span style="font-size:22px;">Project <strong>goal</strong></span><span style="font-size:24px;"></span><span style="font-size:24px;"></span><br> <span style="font-size:18px;"></span>The goal of this project is to develop quantum machine-learning algorithms for the analysis of particle collision data from the LHC experiments. The particular example chosen is the identification and classification of supersymmetry signals from the Standard Model background.<span style="font-size:22px;"><span style="font-size:22px;"><span style="font-size:18px;"><img alt="image" data-entity-type="file" data-entity-uuid="f9f4610d-0c92-4b0e-8deb-9a357a0973e4" src="/sites/default/files/inline-images/Quantum%20machine%20learning%20for%20supersymmetry%20searches.png" class="align-right" width="1054" height="593" loading="lazy"></span></span></span></p> <p><span style="font-size:18px;"></span><span style="font-size:22px;">Project<strong> coordinator(s)</strong></span><br> <span style="font-size:18px;"></span>Koji Terashi (University of Tokyo)</p> <p><span style="font-size:22px;">Team <strong>members</strong></span><br> <span style="font-size:18px;"></span>Michiru Kaneda, Tomoe Kishimoto, Masahiko Saito, Ryu Sawada, Junici Tanaka, Federico Carminati, Sofia Vallecorsa, Fabio Fracas</p> <p><span style="font-size:22px;">Project <strong>background</strong></span><br> The analysis of LHC data for the detection of effects beyond the Standard Model requires increasing levels of precision. Various machine-learning techniques are now part of the standard analysis toolbox for high-energy physics. Deep-learning algorithms are increasingly demonstrating their usefulness in various areas of analysis, thanks to their suitability for exploring a much larger dimensional space.</p> <p>This seems close to an ideal area of application for quantum computing, which offers a parameter space that is potentially enormous, as well as a correspondingly large level of computational parallelism. Moreover, the quasi-optimal Gibbs sampling features of quantum computers may enhance the training of deep-learning networks.</p> <p><span style="font-size:22px;">Recent <b>progress</b></span><br> In 2020, the team in Tokyo pursued the study and characterisation of several quantum algorithms, in order to understand their applicability at different points in the data processing chain. One of the problems being addressed is the acceleration of the event-generation process. Event generators (in particular their integration step) are expected to be extremely demanding in terms of computation time, especially for the generation of multi-jet events at the experiments running in future on the High-Luminosity LHC.</p> <p>In another line of work, we studied different quantum machine-learning models, such as quantum convolutional neural networks, as applied to both classical and quantum data.</p> <p>With the limited qubit counts, connectivity and coherence times of present quantum computers, quantum circuit optimisation is crucial for making the best use of these devices. In addition to the algorithmic studies outlined above, we have studied a novel circuit-optimisation protocol, composed of two techniques:  pattern recognition of repeated sets of gates and reduction of circuit complexity by identifying computational basis states. The developed optimisation protocol demonstrates a significant gate reduction for a quantum algorithm used to simulate parton shower processes.</p> <p><span style="font-size:22px;">Next <b>steps</b></span><br> <span style="font-size:18px;"></span>Current results are very promising. However, they have been obtained using simulations that assume ideal quantum circuits, without taking into account effects such as noise, measurement errors, or limited coherence time. All of these issues can affect quantum hardware significantly, particularly noisy intermediate-scale quantum devices. Our next steps will include a detailed study of strategies for error mitigation.</p> <table border="0" cellpadding="0" cellspacing="1" style="width: 902px;"> <tbody> <tr> <td style="width: 454px;"> <p><span style="font-size:22px;"><strong>Presentations</strong></span></p> <ul> <li>W. Jang, K. Terashi, M. Saito, C. W. Bauer, B. Nachman, Y. Iiyama, T. Kishimoto, R. Okubo, R. Sawada, J. Tanaka, Quantum Gate Pattern Recognition and Circuit Optimization for Scientific Applications (20 May). Presented at 25th International Conference on Computing in High-Energy and Nuclear Physics, 2021.</li> </ul> <ul> <li>W. Jang , K. Terashi, M. Saito, Y. Iiyama, T. Kishimoto, R. Okubo, R. Sawada, J. Tanaka, Quantum Circuit Optimization for Scientific Applications (11 March). Presented at CERN openlab Technical Workshop, Geneva, 2021. <a href="http://cern.ch/go/lqp6">cern.ch/go/lqp6</a></li> </ul> <p> </p> <p> </p> <p> </p> </td> <td style="width: 437px;"> <p><span style="font-size:22px;"><strong>Publications</strong></span></p> <ul> <li>K. Terashi, M. Kaneda, T. Kishimoto, M. Saito, R. Sawada, J. Tanaka, Event Classification with Quantum Machine Learning in High-Energy Physics (3 January). Published in SpringerLink, 2021. <a href="http://cern.ch/go/9WmF">cern.ch/go/9WmF</a></li> <br> <li>W. Guan, G. Perdue, A. Pesah, M. Schuld, K. Terashi, S. Vallecorsa, J. Vlimant, Quantum machine learning in high energy physics (31 March). Published in IOP Science, 2021. <a href="http://cern.ch/go/6lVW">cern.ch/go/6lVW</a></li> <br> <li>W. Jang, K. Terashi, M. Saito, C. W. Bauer, B. Nachman, Y. Liyama, T. Kishimoto, R. Okubo, R. Sawada, J. Tanaka, Quantum Gate Pattern Recognition and Circuit Optimization for Scientific Applications (19 February). Published in arXiv.org, 2021. <a href="http://cern.ch/go/K9jM">cern.ch/go/K9jM</a></li> </ul> </td> </tr> </tbody> </table> </div> </div> </div> </div> <div class="component-row__column component-row__sidebar-right col-md-3 col-sm-12 col-xs-12"> <div class="text-component text-component-page clearfix"> <h2 class="text-component-title"> Other Projects </h2> </div> <div id="preview-card--9" class="component-preview-cards box-pattern landscape landing_page" style="background:url('/sites/default/files/2021-09/Quantum%20optimisation%20for%20grid%20computing_0.png') no-repeat center center / cover" data-background="/sites/default/files/2021-09/Quantum%20optimisation%20for%20grid%20computing_0.png" class="component-preview-cards box-pattern landscape landing_page"> <a class="box-link" target="" href="/quantum-optimisation-grid-computing"></a> <div class="component-preview-cards__veil"></div> <div class="component-preview-cards__box_wrapper"> <div class="component-preview-cards__box"> <div 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