Entanglement Quantification in Low-Temperature Superconducting Flux Qubits

Entanglement Quantification in Low-Temperature Superconducting Flux Qubits | 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 Article Entanglement Quantification in Low-Temperature Superconducting Flux Qubits Jianxin Shi This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7336880/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 This study aims to quantify entanglement in low-temperature superconducting flux qubits using mutual information and concurrence. It presents a theoretical framework, experimental setup for two-qubit systems, and simulations. Results show that the entanglement strength varies periodically with external magnetic flux and saturates with increasing inter-qubit coupling. These results offer guidance for optimizing superconducting quantum circuits in various quantum information processing applications. Physical sciences/Materials science Physical sciences/Physics superconducting flux qubits quantum entanglement quantum information mutual information concurrence 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. 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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-7336880","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":505247526,"identity":"467e3f20-2768-4923-9d0c-41c302bf2812","order_by":0,"name":"Jianxin Shi","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA9klEQVRIiWNgGAWjYBACfmbGxgcJBhJy/OzNBxgSDEBiCfi1SLY3Nxs8qLAxluw5lgDUYkBYi8GZ422SD86kJW64kQNSToQWhhuJzQaJbYeNDQ7kfHvwoOAPAz87UO/PHbh1MM5IbHwA1CIneeDsdgOQwyR73hgw9p7BrYVZAmoL38HebRIgLQZAFzIztuHWwiaR2AZEhxMbDvM8A2uxJ6SFh+dgm0QC0PsTjvGwQWyRIKBFgr2x2SABHMhsZkAtxjwSZ54VHOzFo8X+MPvDhz9AUSn/+Jnkjz9ycvztyRsf/MSjBdOlIOIACRpGwSgYBaNgFGABAJIZVia58lsbAAAAAElFTkSuQmCC","orcid":"","institution":"Nanjing University of Industry Technology","correspondingAuthor":true,"prefix":"","firstName":"Jianxin","middleName":"","lastName":"Shi","suffix":""}],"badges":[],"createdAt":"2025-08-10 05:23:07","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-7336880/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-7336880/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":97672139,"identity":"bfa2e839-9b66-49b6-8677-38b93dad4dd8","added_by":"auto","created_at":"2025-12-08 09:34:23","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":524364,"visible":true,"origin":"","legend":"","description":"","filename":"EntanglementQuantificationinLowTemperatureSuperconductingFluxQubits.pdf","url":"https://assets-eu.researchsquare.com/files/rs-7336880/v1_covered_abf97035-8379-4dde-a6e9-529b2c47f952.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Entanglement Quantification in Low-Temperature Superconducting Flux Qubits","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"superconducting flux qubits, quantum entanglement, quantum information, mutual information, concurrence","lastPublishedDoi":"10.21203/rs.3.rs-7336880/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-7336880/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"This study aims to quantify entanglement in low-temperature superconducting flux qubits using mutual information and concurrence. 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