{"id":1924,"date":"2024-02-06T22:40:00","date_gmt":"2024-02-06T22:40:00","guid":{"rendered":"https:\/\/nordquantique.com\/toward-fault-tolerant-quantum-computing-with-bosonic-codes-at-march-meeting-2024\/"},"modified":"2026-02-06T22:51:25","modified_gmt":"2026-02-06T22:51:25","slug":"toward-fault-tolerant-quantum-computing-with-bosonic-codes-at-march-meeting-2024","status":"publish","type":"post","link":"https:\/\/nordquantique.com\/fr\/articles\/toward-fault-tolerant-quantum-computing-with-bosonic-codes-at-march-meeting-2024\/","title":{"rendered":"Toward fault-tolerant quantum computing with bosonic codes at March Meeting 2024"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"1924\" class=\"elementor elementor-1924 elementor-1913\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b4e71eb e-flex e-con-boxed e-con e-parent\" data-id=\"b4e71eb\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4f597e6 elementor-widget elementor-widget-heading\" data-id=\"4f597e6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">March is always an exciting time for physics and quantum computing! <\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bd7446f elementor-widget elementor-widget-text-editor\" data-id=\"bd7446f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>A lot of interesting work has been going on at Nord Quantique over the last year, which is why we\u2019re thrilled to present our progress toward fault-tolerent quantum computing with bosonic codes at the\u00a0APS March Meeting 2024.\u00a0<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a9bb797 elementor-widget elementor-widget-heading\" data-id=\"a9bb797\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Presentation Summary<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e20ea4f elementor-widget elementor-widget-text-editor\" data-id=\"e20ea4f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"box-sizing: inherit; margin: 26.25px 0px 0px; padding: 0px; position: relative; width: 905px; font-family: ATSurt, -apple-system, 'system-ui', 'avenir next', avenir, 'segoe ui', 'helvetica neue', helvetica, Cantarell, Ubuntu, roboto, noto, arial, sans-serif; font-size: 15px;\">W47.010:\u00a0Bosonic Pauli+: Efficient Simulation of Concatenated GKP Codes<\/p>\n<p><\/p>\n<p style=\"box-sizing: inherit; margin: 1rem 0px 0px; padding: 0px; position: relative; width: 905px; font-family: ATSurt, -apple-system, 'system-ui', 'avenir next', avenir, 'segoe ui', 'helvetica neue', helvetica, Cantarell, Ubuntu, roboto, noto, arial, sans-serif; font-size: 15px;\">W47.011:\u00a0Towards a second layer of quantum error correction for Gottesman-Kitaev-Preskill states<\/p>\n<p><\/p>\n<p style=\"box-sizing: inherit; margin: 1rem 0px 0px; padding: 0px; position: relative; width: 905px; font-family: ATSurt, -apple-system, 'system-ui', 'avenir next', avenir, 'segoe ui', 'helvetica neue', helvetica, Cantarell, Ubuntu, roboto, noto, arial, sans-serif; font-size: 15px;\"><em style=\"box-sizing: inherit;\">Congratulating previous work by Sandoko Kosen:<\/em><br style=\"box-sizing: inherit;\" \/>D49.001:\u00a0Building superconducting quantum processors in flip-chip architecture<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-457a686 elementor-widget elementor-widget-heading\" data-id=\"457a686\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Meet with our team at the March Meeting<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3ab6363 elementor-widget elementor-widget-text-editor\" data-id=\"3ab6363\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"o-container -medium || u-margin-medium-top u-margin-large-bottom c-wysiwyg u-anim-scroll is-inview\" data-scroll=\"\">\n<p>If you would like to<\/p>\n<ol>\n<li>talk about some of the great work being done around the exciting field of bosonic codes in quantum computing<\/li>\n<li>learn more about Nord Quantique<\/li>\n<li>hear about job opportunities with us (check out our job board as well !)<\/li>\n<li>simply spend time with a bunch of passionate people!\n<\/li>\n<\/ol>\n<p>Reach out to info@nordquantique.ca and we&rsquo;ll arrange an onsite meeting for you.\u00a0<\/p>\n<\/div>\n<div class=\"o-container -medium || u-margin-medium-top u-margin-large-bottom c-wysiwyg u-anim-scroll is-inview\" data-scroll=\"\">\u00a0<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ed56891 elementor-widget elementor-widget-heading\" data-id=\"ed56891\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">March Meeting Abstracts<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2a5e627 elementor-widget elementor-widget-heading\" data-id=\"2a5e627\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">W47.010: Bosonic Pauli+: Efficient Simulation of Concatenated GKP Codes<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-25780c2 elementor-widget elementor-widget-text-editor\" data-id=\"25780c2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"o-container -medium || u-margin-medium-top u-margin-large-bottom c-wysiwyg u-anim-scroll is-inview\" data-scroll=\"\">\n<p>Thu. March 7, 4:48 p.m. \u2013 5:00 p.m. CST \u00a0\u2013\u00a0 Room 200CD<\/p>\n<p>Presenter: Florian Hopfmueller<\/p>\n<p>A promising route towards fault-tolerant error correction is the concatenation of a Gottesman-Kitaev-Preskill (GKP) code with a qubit code. Development of such concatenated codes requires simulation tools which realistically model noise, while being able to simulate the dynamics of many modes. However, so far, large-scale simulation tools for concatenated GKP codes have been limited to idealized noise models and GKP code implementations. Here, we introduce the Bosonic Pauli+ model (BP+), which can be simulated efficiently for a large number of modes, while accurately capturing the rich dynamics in the bosonic multi-mode Hilbert space for a realistic finite-energy GKP code stabilized with the sBs protocol, with given physical decoherence rates. BP+ relies on a new decomposition of the GKP Hilbert space into a logical and an error subsystem, which we call the sBs basis. Confidence in the accuracy of BP+ is gained by comparing predictions of BP+ and full time evolution simulations, for several deep quantum circuits of interest. Using BP+, logical error rates of a concatenated code implementation are presented. BP+ may also be applicable to other bosonic codes.<\/p>\n<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fb57316 elementor-widget elementor-widget-heading\" data-id=\"fb57316\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">W47.011: Towards a second layer of quantum error correction for Gottesman-Kitaev-Preskill states<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-949a15c elementor-widget elementor-widget-text-editor\" data-id=\"949a15c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"o-container -medium || u-margin-medium-top u-margin-large-bottom c-wysiwyg u-anim-scroll is-inview\" data-scroll=\"\">\n<p>Thu. March 7, 5:00 p.m. \u2013 5:12 p.m. CST\u00a0 \u2013 \u00a0Room\u00a0200CD<\/p>\n<p>Presenter: Dany Lachance-Quirion<\/p>\n<p>Approaches based on bosonic codes hold the promise of easing the requirements on the number of modes needed for fault-tolerant quantum computing compared with ones based on two-level systems. The finite-energy Gottesman-Kitaev-Preskill (GKP) code is of particular interest, as highlighted by recent experiments demonstrating an increase of its logical lifetime from quantum error correction (QEC) in superconducting devices [1-3]. Nevertheless, a second layer of quantum error correction will likely be required to reach the error rates necessary for useful quantum computation [4]. An important step in that direction is the demonstration of operations in an architecture involving multiple GKP qubits. Here, we present experimental progress on the implementation of a building block composed of a syndrome unit connected to two data units, each hosting an encoded GKP qubit.<\/p>\n<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e20812d elementor-widget elementor-widget-text-editor\" data-id=\"e20812d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"box-sizing: inherit; margin: 1rem 0px 0px; padding: 0px; position: relative; width: 905px; font-family: ATSurt, -apple-system, 'system-ui', 'avenir next', avenir, 'segoe ui', 'helvetica neue', helvetica, Cantarell, Ubuntu, roboto, noto, arial, sans-serif; font-size: 15px;\"><span style=\"box-sizing: inherit; position: relative; margin: 0px; width: 100%; font-size: 8pt;\">[1] P. Campagne-Ibarcq et al., Nature, 584, 368 (2019).<br style=\"box-sizing: inherit;\" \/><\/span><span style=\"box-sizing: inherit; position: relative; margin: 0px; width: 100%; font-size: 8pt;\">[2] V. V. Sivak et al., Nature, 616, 55 (2023).<br style=\"box-sizing: inherit;\" \/><\/span><span style=\"box-sizing: inherit; position: relative; margin: 0px; width: 100%; font-size: 8pt;\">[3] D. Lachance-Quirion et al., arXiv:2310.11400 (2023).<br style=\"box-sizing: inherit;\" \/><\/span><span style=\"box-sizing: inherit; position: relative; margin: 0px; width: 100%; font-size: 8pt;\">[4] A. L. Grimsmo and S. Puri, PRX Quantum, 2, 020101 (2021).<\/span><\/p>\n<div><span style=\"box-sizing: inherit; position: relative; margin: 0px; width: 100%; font-size: 8pt;\">\u00a0<\/span><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1e96997 elementor-widget elementor-widget-heading\" data-id=\"1e96997\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">D49.001: Building superconducting quantum processors in flip-chip architecture<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c84140b elementor-widget elementor-widget-text-editor\" data-id=\"c84140b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"o-container -medium || u-margin-medium-top u-margin-large-bottom c-wysiwyg u-anim-scroll is-inview\" data-scroll=\"\">\n<p>Mon. March 4, 3:00 p.m. \u2013 3:36 p.m. CST\u00a0 \u2013 \u00a0Room 200G<\/p>\n<p>Presenter: Sandoko Kosen<\/p>\n<p>State-of-the-art superconducting quantum processors heavily leverage the multi-chip architecture to enable larger and more complex circuitry. The challenge is to ensure that such an architecture does not degrade the device performance as we continue to scale to larger systems.<br \/>At the Chalmers University of Technology (Sweden), we employ a two-chip stack architecture where a qubit chip is flip-chip-bonded to a control chip. In a successful collaboration with VTT (Finland), we demonstrated flip-chip qubit devices with coherence and gate fidelity performances that are similar to our in-house single-chip devices. We have further scaled this integration technology to fully-packaged multi-qubit processors and demonstrated control-signal crosstalk with favourable behaviour.<br \/>In this talk, I will describe this flip-chip approach and highlight recent advances from the community. In particular, I will focus on lessons we learned from building quantum processors using this architecture: from design of single qubit all the way to the on-chip signal-delivery strategy, and discuss the technical challenges that lie ahead.<\/p>\n<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>March is always an exciting time for physics and quantum computing! A lot of interesting work has been going on at Nord Quantique over the last year, which is why we\u2019re thrilled to present our progress toward fault-tolerent quantum computing with bosonic codes at the\u00a0APS March Meeting 2024.\u00a0 Presentation Summary W47.010:\u00a0Bosonic Pauli+: Efficient Simulation of [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":1923,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[43,36],"tags":[],"class_list":["post-1924","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-evenements","category-events"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Toward fault-tolerant quantum computing with bosonic codes at March Meeting 2024 - Nord Quantique\u2122<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/nordquantique.com\/fr\/articles\/toward-fault-tolerant-quantum-computing-with-bosonic-codes-at-march-meeting-2024\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Toward fault-tolerant quantum computing with bosonic codes at March Meeting 2024 - Nord Quantique\u2122\" \/>\n<meta property=\"og:description\" content=\"March is always an exciting time for physics and quantum computing! 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