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dc.contributor.authorQiu, Len
dc.contributor.authorShomroni, Ien
dc.contributor.authorIoannou, MAen
dc.contributor.authorPiro, Nen
dc.contributor.authorMalz, Danielen
dc.contributor.authorNunnenkamp, Andreasen
dc.contributor.authorKippenberg, TJen
dc.date.accessioned2019-10-16T23:30:13Z
dc.date.available2019-10-16T23:30:13Z
dc.date.issued2019-11-25en
dc.identifier.issn2469-9926
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/297877
dc.description.abstractThe radiation-pressure interaction between one or more laser fields and a mechanical oscillator gives rise to a wide range of phenomena: from sideband cooling and backaction-evading measurements to pondermotive and mechanical squeezing to entanglement and motional sideband asymmetry. In many protocols, such as dissipative mechanical squeezing, multiple lasers are utilized, giving rise to periodically driven optomechanical systems. Here we show that in this case, Floquet dynamics can arise due to presence of Kerr-type nonlinearities, which are ubiqitious in optomechanical systems. Specifically, employing multiple probe tones, we perform sideband asymmetry measurements, a macroscopic quantum effect, on a silicon optomechanical crystal sideband-cooled to 40% ground-state occupation. We show that the Floquet dynamics, resulting from the presence of multiple pump tones, gives rise to an artificially modified motional sideband asymmetry by redistributing thermal and quantum fluctuations among the initially independently scattered thermomechanical sidebands. For pump tones exhibiting large frequency separation, the dynamics is suppressed and accurate quantum noise thermometry demonstrated. We develop a theoretical model based on Floquet theory that accurately describes our observations. The resulting dynamics can be understood as resulting from a synthetic gauge field among the Fourier modes, which is created by the phase lag of the Kerr-type response. This novel phenomenon has wide-ranging implications for schemes utilizing several pumping tones, as commonly employed in backaction-evading measurements, dissipative optical squeezing, dissipative mechanical squeezing and quantum noise thermometry. Our observation may equally well be used for optomechanical Floquet engineering, e.g. generation of topological phases of sound by periodic time-modulation.
dc.publisherAmerican Physical Society
dc.rightsAll rights reserved
dc.rights.uri
dc.titleFloquet dynamics in the quantum measurement of mechanical motionen
dc.typeArticle
prism.issueIdentifier5en
prism.publicationDate2019en
prism.publicationNamePhysical Review Aen
prism.volume100en
dc.identifier.doi10.17863/CAM.44934
dcterms.dateAccepted2019-10-15en
rioxxterms.versionofrecord10.1103/PhysRevA.100.053852en
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2019-11-25en
dc.contributor.orcidMalz, Daniel [0000-0002-8832-0927]
dc.contributor.orcidNunnenkamp, Andreas [0000-0003-2390-7636]
dc.identifier.eissn2469-9934
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (732894)
pubs.funder-project-idEPSRC (EP/M506485/1)
cam.orpheus.successThu Jan 30 10:38:37 GMT 2020 - Embargo updated*
rioxxterms.freetoread.startdate2019-11-25


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