Fault-Tolerant Photonic Quantum Computing via Time-Reflection Dynamics

Fault-Tolerant Photonic Quantum Computing via Time-Reflection Dynamics | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Fault-Tolerant Photonic Quantum Computing via Time-Reflection Dynamics S. M. Ashik Mahmud This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8599237/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract I introduce time-reflection photonic quantum computing, an architecture in which qubits are encoded in pairs of counterpropagating photonic modes that evolve along dual temporal channels. By engineering gates that implement time reflections between these channels, the dynamics become intrinsically reversible, causing dominant error processes—dephasing, photon loss, and phase noise—to be continuously unwound and rephased without external feedback or active errorcorrection cycles. This builtin selfcorrection enables ultralowenergy quantum information processing at room temperature and substantially reduces hardware complexity compared with superconducting or trappedion platforms. My analytical modeling and numerical simulations show that timereflection circuits preserve coherence over large depths, maintain high fidelities in the presence of realistic noise, and support the implementation of a universal gate set using photonic resources. These results establish timereflection photonic architectures as a promising, energyefficient route toward scalable quantum information processing. Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-8599237","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":596213598,"identity":"66878a2b-69ed-4838-bd0b-51d4cd65eb7e","order_by":0,"name":"S. M. 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