{"id":152,"date":"2025-12-04T14:20:45","date_gmt":"2025-12-04T12:20:45","guid":{"rendered":"https:\/\/phsites.technion.ac.il\/qnano\/?page_id=152"},"modified":"2025-12-10T14:04:08","modified_gmt":"2025-12-10T12:04:08","slug":"symmetry-protection-of-quantum-information","status":"publish","type":"page","link":"https:\/\/phsites.technion.ac.il\/qnano\/research\/symmetry-protection-of-quantum-information\/","title":{"rendered":"Symmetry protection"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Symmetry protection of quantum information<\/h2>\n\n\n\n<div class=\"wp-block-genesis-blocks-gb-columns gpb-monochrome-section-text-and-image-columns gb-layout-columns-2 gb-2-col-equal gb-has-custom-background-color gb-has-custom-text-color gb-columns-center alignfull\" style=\"padding-top:2em;padding-right:1em;padding-bottom:3em;padding-left:1em;background-color:#ffffff;color:#1f1f1f\"><div class=\"gb-layout-column-wrap gb-block-layout-column-gap-3 gb-is-responsive-column\" style=\"max-width:1200px\">\n<div class=\"wp-block-genesis-blocks-gb-column gb-block-layout-column gb-is-vertically-aligned-top\"><div class=\"gb-block-layout-column-inner\">\n<p style=\"font-size:18px\">Symmetries play a fundamental role in physics, determining how a system behaves under specific transformations. When carefully engineered, they can make a system naturally resistant to disturbances, preventing it from changing state even in the presence of noise.<\/p>\n\n\n\n<p>By designing short chains of qubits with a high degree of symmetry, we create an intrinsically protected logical qubit that is naturally resilient to the main sources of relaxation and decoherence, enhancing coherence by orders of magnitude without significant hardware overhead.<\/p>\n\n\n\n<p style=\"font-size:18px\">This protected logical qubit can be realized with a superconducting circuit using a small number of Josephson junctions and provides a possible route toward robust, scalable quantum computing.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-genesis-blocks-gb-column gb-block-layout-column gb-is-vertically-aligned-top\"><div class=\"gb-block-layout-column-inner\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"154\" src=\"http:\/\/phsites.technion.ac.il\/qnano\/wp-content\/uploads\/sites\/80\/2025\/12\/image_protection.png\" alt=\"Interacting spin chain and phase diagram showing relaxation and dephasing protection regions\" class=\"wp-image-153\" srcset=\"https:\/\/phsites.technion.ac.il\/qnano\/wp-content\/uploads\/sites\/80\/2025\/12\/image_protection-300x92.png 300w, https:\/\/phsites.technion.ac.il\/qnano\/wp-content\/uploads\/sites\/80\/2025\/12\/image_protection.png 500w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/figure>\n\n\n\n<div class=\"wp-block-group has-alt-background-color has-background has-light-background\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h3 class=\"wp-block-heading\">Read more<\/h3>\n\n\n\n<ul class=\"wp-block-list has-alt-background-color has-background\">\n<li><em><a href=\"https:\/\/phsites.technion.ac.il\/qnano\/wp-content\/uploads\/sites\/80\/2025\/12\/PhysRevApplied.17.024057.pdf\">Protection of quantum information in a chain of Josephson junctions<\/a>,<\/em>\u00a0P. Brookes, T. Chang, M. Szymanska, E. Grosfeld, E. Ginossar &#038; M. Stern,\u00a0<a href=\"https:\/\/doi.org\/10.1103\/PhysRevApplied.17.024057\">Phys. Rev. Applied,\u00a0<strong>17<\/strong>, 024057 (2022)<\/a>.<\/li>\n\n\n\n<li>Symmetry-protected states of interacting qubits in superconducting quantum circuits Yi Shi, Eran Ginossar, Michael Stern, Marzena Szymanska, <a href=\"https:\/\/doi.org\/10.48550\/arXiv.2510.14121\">arXiv:2510.14121<\/a><\/li>\n<\/ul>\n<\/div><\/div>\n\n<\/div><\/div>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Symmetry protection of quantum information<\/p>\n","protected":false},"author":2,"featured_media":165,"parent":155,"menu_order":4,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"class_list":{"1":"page","2":"type-page","6":"entry"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Symmetry protection - 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