Quantum correlation-enhenced dual-comb spectroscopy

Quantum correlation-enhenced dual-comb spectroscopy | 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 Quantum correlation-enhenced dual-comb spectroscopy Ming Yan, Zhuoren Wan, Yuan Chen, Xiuxiu Zhang, Heping Zeng This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5553447/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 Dual-comb spectroscopy (DCS) is a powerful technique for spectroscopic sensing, offering exceptional resolution, precision, and speed. However, its performance is fundamentally limited by quantum noise inherent to coherent-state optical combs. Here, we overcome this barrier by introducing quantum correlation-enhanced DCS using correlated twin combs generated via seeded four-wave mixing. One comb acts as a local oscillator to decode molecular signals, while the twin suppresses shot noise through intensity-difference squeezing, achieving a 2 dB signal-to-noise ratio improvement beyond the shot-noise limit—equivalent to a 2.6× measurement speed enhancement. Notably, when paired with up-conversion spectroscopy, our approach achieves comb-line-resolved, high-resolution spectra (0.0067 cm⁻¹, 7.5 pm) in the critical 3 μm region for molecular fingerprinting. These results bridge quantum optics and frequency comb spectroscopy, offering great potential for trace gas detection, precision metrology, and chemical analysis. Future developments in detector efficiency and nanophotonic integration could further enhance its scalability and impact. Spectroscopy dual-comb spectroscopy molecular spectroscopy gas sensing optical frequency comb Full Text Additional Declarations The authors declare no competing interests. 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-5553447","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":384527078,"identity":"98c2ef68-d637-48ea-9fce-a0d0255dd650","order_by":0,"name":"Ming Yan","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA20lEQVRIiWNgGAWjYLCCDwUINmMDMToYZxiQqoWZhyQtujOSnz22Mbhjz8De/OwxD4ON7IYDzM8e4NNidiPN3DjH4FliA88xc2MehjTjDQfYzA3wa0kwk84xOJzAIJHDJs3DcDhxwwEeNgn8WtK/SVsYHLZnkH8D0vKfGC05ZtIMBocZGyR4QFoOEKHlzJsyyR6gX9p40swk5xgkG888zGaGX8vx9G0SPyru2POzH34m8abCTrbvePMzvFoYBBJA5AEGNjAPFFTMeNUDAf8BiJZRMApGwSgYBTgBAGIKQqinesZmAAAAAElFTkSuQmCC","orcid":"https://orcid.org/0000-0003-4327-0759","institution":"East China Normal University","correspondingAuthor":true,"submittingAuthor":false,"prefix":"","firstName":"Ming","middleName":"","lastName":"Yan","suffix":""},{"id":384529081,"identity":"5fa12297-7e8e-4132-af54-61a455b115ab","order_by":1,"name":"Zhuoren Wan","email":"","orcid":"","institution":"East China Normal University","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Zhuoren","middleName":"","lastName":"Wan","suffix":""},{"id":384529112,"identity":"d7e7d4af-06c1-44e7-ab50-b1f3a2f441d1","order_by":2,"name":"Yuan Chen","email":"","orcid":"","institution":"East China Normal University","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Yuan","middleName":"","lastName":"Chen","suffix":""},{"id":384529113,"identity":"b517e3d3-4951-4924-854a-a90ce2474edf","order_by":3,"name":"Xiuxiu Zhang","email":"","orcid":"","institution":"East China Normal University","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Xiuxiu","middleName":"","lastName":"Zhang","suffix":""},{"id":384529114,"identity":"abf931c0-83c8-4642-b116-5df61e1d0898","order_by":4,"name":"Heping Zeng","email":"","orcid":"","institution":"East China Normal University","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Heping","middleName":"","lastName":"Zeng","suffix":""}],"badges":[],"createdAt":"2024-11-30 09:17:55","currentVersionCode":1,"declarations":{"humanSubjects":false,"vertebrateSubjects":false,"conflictsOfInterestStatement":false,"humanSubjectEthicalGuidelines":false,"humanSubjectConsent":false,"humanSubjectClinicalTrial":false,"humanSubjectCaseReport":false,"vertebrateSubjectEthicalGuidelines":false,"coiExplicitlySet":false},"doi":"10.21203/rs.3.rs-5553447/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-5553447/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":70421808,"identity":"48087887-6afa-417d-b168-fdc4addf4343","added_by":"auto","created_at":"2024-12-03 04:27:48","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":832772,"visible":true,"origin":"","legend":"","description":"","filename":"QCDCS.pdf","url":"https://assets-eu.researchsquare.com/files/rs-5553447/v1_covered_908f5ef7-14b9-4058-9b49-2ec562314412.pdf"}],"financialInterests":"The authors declare no competing interests.","formattedTitle":"\u003cp\u003eQuantum correlation-enhenced dual-comb spectroscopy\u003c/p\u003e","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":true,"hideJournal":true,"highlight":"","institution":"East China Normal University","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":true,"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":"dual-comb spectroscopy, molecular spectroscopy, gas sensing, optical frequency comb","lastPublishedDoi":"10.21203/rs.3.rs-5553447/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-5553447/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eDual-comb spectroscopy (DCS) is a powerful technique for spectroscopic sensing, offering exceptional resolution, precision, and speed. However, its performance is fundamentally limited by quantum noise inherent to coherent-state optical combs. Here, we overcome this barrier by introducing quantum correlation-enhanced DCS using correlated twin combs generated via seeded four-wave mixing. One comb acts as a local oscillator to decode molecular signals, while the twin suppresses shot noise through intensity-difference squeezing, achieving a 2 dB signal-to-noise ratio improvement beyond the shot-noise limit—equivalent to a 2.6× measurement speed enhancement. Notably, when paired with up-conversion spectroscopy, our approach achieves comb-line-resolved, high-resolution spectra (0.0067 cm⁻¹, 7.5 pm) in the critical 3 μm region for molecular fingerprinting. These results bridge quantum optics and frequency comb spectroscopy, offering great potential for trace gas detection, precision metrology, and chemical analysis. Future developments in detector efficiency and nanophotonic integration could further enhance its scalability and impact.\u003c/p\u003e","manuscriptTitle":"Quantum correlation-enhenced dual-comb spectroscopy","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-12-03 04:19:40","doi":"10.21203/rs.3.rs-5553447/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","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}}],"origin":"","ownerIdentity":"cf5ab2ea-97d6-43f8-a40f-f6fdd7baca3e","owner":[],"postedDate":"December 3rd, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":40969075,"name":"Spectroscopy"}],"tags":[],"updatedAt":"2024-12-27T02:30:22+00:00","versionOfRecord":[],"versionCreatedAt":"2024-12-03 04:19:40","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-5553447","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-5553447","identity":"rs-5553447","version":["v1"]},"buildId":"7rjqhiLT3MXkJMwkYKINL","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}