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Quantum Enhanced Balanced Heterodyne Readout for Differential Interferometry

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dc.contributor.authorGould, Daniel W.en
dc.contributor.authorAdya, Vaishali B.en
dc.contributor.authorChua, Sheon S.Y.en
dc.contributor.authorJunker, Jonasen
dc.contributor.authorWilken, Dennisen
dc.contributor.authorMcRae, Terry G.en
dc.contributor.authorSlagmolen, Bram J.J.en
dc.contributor.authorYap, Min Jeten
dc.contributor.authorWard, Robert L.en
dc.contributor.authorHeurs, Michèleen
dc.contributor.authorMcClelland, David E.en
dc.date.accessioned2025-05-23T11:23:47Z
dc.date.available2025-05-23T11:23:47Z
dc.date.issued2024-08-09en
dc.description.abstractConventional heterodyne readout schemes are now under reconsideration due to the realization of techniques to evade its inherent 3 dB signal-to-noise penalty. The application of high-frequency, quadrature-entangled, two-mode squeezed states can further improve the readout sensitivity of audio-band signals. In this Letter, we experimentally demonstrate quantum-enhanced heterodyne readout of two spatially distinct interferometers with direct optical signal combination, circumventing the 3 dB heterodyne signal-to-noise penalty. Applying a high-frequency, quadrature-entangled, two-mode squeezed state, we show further signal-to-noise improvement of an injected audio band signal of 3.5 dB. This technique is applicable for quantum-limited high-precision experiments, with application to searches for quantum gravity, searches for dark matter, gravitational wave detection, and wavelength-multiplexed quantum communication.en
dc.description.sponsorshipThe authors wish to thank Moritz Mehmet for useful discussions and insights. This research was supported by the Australian Research Council under the Discovery Grant scheme, Grant No. DP220102755. D.\u2009W.\u2009G. would like to acknowledge the funding from the Australian Government Research Training Program (RTP) Scholarship for his research. V.\u2009B.\u2009A. would like to acknowledge the support and funding from the Swedish Research Council (VR starting Grant No. 2023-0519 and Optical Quantum Sensing environment Grant No. 2016-06122) and the Wallenberg Center for Quantum Technology (WACQT) in Sweden. The authors would like to also thank the support of the Australian Research Council under the ARC Centre of Excellence for Gravitational Wave Discovery, Grant No. CE170100004, and Deutsche Forschungsgemeinschaft [Excellence PhoenixD (EXC 2122, Project ID 390833453), Excellence Quantum Frontiers (EXC 2123, Project ID 390837967)].en
dc.description.statusPeer-revieweden
dc.identifier.issn0031-9007en
dc.identifier.otherPubMed:39178444en
dc.identifier.otherORCID:/0000-0002-6540-6824/work/184101364en
dc.identifier.otherORCID:/0000-0002-2471-3828/work/184103030en
dc.identifier.otherORCID:/0000-0002-3051-4374/work/187311836en
dc.identifier.scopus85200914768en
dc.identifier.urihttp://www.scopus.com/inward/record.url?scp=85200914768&partnerID=8YFLogxKen
dc.identifier.urihttps://hdl.handle.net/1885/733752161
dc.language.isoenen
dc.rightsPublisher Copyright: © 2024 American Physical Society.en
dc.sourcePhysical Review Lettersen
dc.titleQuantum Enhanced Balanced Heterodyne Readout for Differential Interferometryen
dc.typeJournal articleen
dspace.entity.typePublicationen
local.contributor.affiliationGould, Daniel W.; ANU College of Science and Medicine, The Australian National Universityen
local.contributor.affiliationAdya, Vaishali B.; KTH Royal Institute of Technologyen
local.contributor.affiliationChua, Sheon S.Y.; Centre for Gravitational Astrophysics, ANU College of Science and Medicine, The Australian National Universityen
local.contributor.affiliationJunker, Jonas; Centre for Gravitational Astrophysics, ANU College of Science and Medicine, The Australian National Universityen
local.contributor.affiliationWilken, Dennis; Leibniz University Hannoveren
local.contributor.affiliationMcRae, Terry G.; Centre for Gravitational Astrophysics, ANU College of Science and Medicine, The Australian National Universityen
local.contributor.affiliationSlagmolen, Bram J.J.; Centre for Gravitational Astrophysics, ANU College of Science and Medicine, The Australian National Universityen
local.contributor.affiliationYap, Min Jet; Centre for Gravitational Astrophysics, ANU College of Science and Medicine, The Australian National Universityen
local.contributor.affiliationWard, Robert L.; Centre for Gravitational Astrophysics, ANU College of Science and Medicine, The Australian National Universityen
local.contributor.affiliationHeurs, Michèle; Leibniz University Hannoveren
local.contributor.affiliationMcClelland, David E.; Centre for Gravitational Astrophysics, ANU College of Science and Medicine, The Australian National Universityen
local.identifier.citationvolume133en
local.identifier.doi10.1103/PhysRevLett.133.063602en
local.identifier.pure0aa2281d-e769-498f-8564-a5deedea878aen
local.identifier.urlhttps://www.scopus.com/pages/publications/85200914768en
local.type.statusPublisheden

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