Sustaining quantum coherence in nanoelectronic transport through device state estimation

Sustaining quantum coherence in nanoelectronic transport through device state estimation | 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 Sustaining quantum coherence in nanoelectronic transport through device state estimation Saikumar Krithivasan, Thingujam Yaiphalemba Meitei, Arijit Sen, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9305493/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 4 You are reading this latest preprint version Abstract Quantum coherence is a fragile quantum resource that is typically degraded by environmental interactions. We demonstrate that, in quantum double dot system connected to fermionic reservoirs, coherence can instead be generated from an initially incoherent state and sustained in the steady state through nonequilibrium particle transport. The dynamics is analyzed within the framework of quantum resource theory by expressing the density operator elements in terms of fermionic operator expectation values. Their time evolution is obtained exactly using the quantum Langevin equation, yielding a treatment that remains valid over a wide range of system-reservoir parameters and naturally incorporates non-Markovian effects. By tuning reservoir parameters such as coupling strength and spectral bandwidth, we identify regimes in which steady-state coherence and particle current are simultaneously enhanced. Our results establish a direct operational connection between coherence and charge transport, providing quantitative guidance for stabilizing coherence in nanoscale devices operating far from equilibrium. Nanoelectronic devices Quantum coherence Quantum transport Open quantum systems nonMarkovian dynamics nonequilibrium dynamics Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Reviewers invited by journal 08 May, 2026 Editor assigned by journal 03 Apr, 2026 Submission checks completed at journal 03 Apr, 2026 First submitted to journal 02 Apr, 2026 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-9305493","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":636735048,"identity":"7cd1e1ee-d6e2-496a-809a-dd050f5b7bca","order_by":0,"name":"Saikumar Krithivasan","email":"","orcid":"","institution":"SRM Institute of Science and Technology","correspondingAuthor":false,"prefix":"","firstName":"Saikumar","middleName":"","lastName":"Krithivasan","suffix":""},{"id":636735056,"identity":"a7ec7917-6910-400b-bd32-d73147570752","order_by":1,"name":"Thingujam Yaiphalemba Meitei","email":"","orcid":"","institution":"SRM Institute of Science and Technology","correspondingAuthor":false,"prefix":"","firstName":"Thingujam","middleName":"Yaiphalemba","lastName":"Meitei","suffix":""},{"id":636735060,"identity":"80d796a2-bc2e-4e0c-b010-75f2d340989a","order_by":2,"name":"Arijit Sen","email":"","orcid":"","institution":"SRM Institute of Science and Technology","correspondingAuthor":false,"prefix":"","firstName":"Arijit","middleName":"","lastName":"Sen","suffix":""},{"id":636735064,"identity":"5a79e120-e95b-43b5-87de-6274d84dd810","order_by":3,"name":"Md Manirul Ali","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA6UlEQVRIiWNgGAWjYJCCAwwMFnIMzAwgxAAjCWqRMGZgZkbWkkBQl0RiAwMzsvl4tOi2nz14uLJNIr2/nf/g54KKO3n87QxsDz7+wK3F7ExewsGzbRK5Mw4zM0vPOPOsWOIwA7vhDDy2mB3IMTjYCNSygZmZjZm37XBiw2EGNmkefFrOvwFrSTcAa/l3OHE+SMsffFpuQGxJgGhpOJy4AaQFn/fNbgBtaTgnYQj0i7E0z7HDiRsPM7ZJ9qThc1iO8ceGMht5/v6DDz/z1BxOnHf+8DGJHza4tWADjA2kqR8Fo2AUjIJRgAEApy9N8FC6a4oAAAAASUVORK5CYII=","orcid":"","institution":"Chennai Institute of Technology","correspondingAuthor":true,"prefix":"","firstName":"Md","middleName":"Manirul","lastName":"Ali","suffix":""}],"badges":[],"createdAt":"2026-04-02 16:24:05","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-9305493/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-9305493/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":109759720,"identity":"35388329-aed5-4489-8d62-222140d2cf55","added_by":"auto","created_at":"2026-05-22 07:27:35","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":885358,"visible":true,"origin":"","legend":"","description":"","filename":"manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-9305493/v1_covered_0d0100f3-591f-4a97-98ec-ef42c963ef5e.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Sustaining quantum coherence in nanoelectronic transport through device state estimation","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"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":"quantum-information-processing","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"qinp","sideBox":"Learn more about [Quantum Information Processing](http://link.springer.com/journal/11128)","snPcode":"11128","submissionUrl":"https://submission.nature.com/new-submission/11128/3","title":"Quantum Information Processing","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"stoa","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"Nanoelectronic devices, Quantum coherence, Quantum transport, Open quantum systems, nonMarkovian dynamics, nonequilibrium dynamics","lastPublishedDoi":"10.21203/rs.3.rs-9305493/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-9305493/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"Quantum coherence is a fragile quantum resource that is typically degraded by environmental interactions. 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