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dc.contributor.authorArita, Yoshihiko
dc.contributor.authorSimpson, Stephen
dc.contributor.authorBruce, Graham David
dc.contributor.authorWright, Ewan Malcolm
dc.contributor.authorcz, Academy of sciences of
dc.contributor.authorDholakia, Kishan
dc.identifier.citationArita , Y , Simpson , S , Bruce , G D , Wright , E M , cz , A O S O & Dholakia , K 2023 , ' Cooling the optical-spin driven limit cycle oscillations of a levitated gyroscope ' , Communications Physics , vol. 6 .
dc.identifier.otherPURE: 292127918
dc.identifier.otherPURE UUID: 35b3be28-796f-4527-a4a8-7ac566618dae
dc.identifier.otherORCID: /0000-0003-3403-0614/work/142498976
dc.identifier.otherScopus: 85169685984
dc.descriptionFunding: Acknowledgements Engineering and Physical Sciences Research Council (EP/P030017/1); Australian Research Council (DP220102303); Akademie vĕd České republiky (Praemium Academiae); Ministerstvo Školství, Mládeže a Tělovýchovy (CZ.02.1.01/0.0/0.0/15 003/0000476).en
dc.description.abstractBirefringent microspheres, trapped in vacuum and set into rotation by circularly polarised light, demonstrate remarkably stable translational motion. This is in marked contrast to isotropic particles in similar conditions. Here we demonstrate that this stability is obtained because the fast rotation of these birefringent spheres reduces the effect of azimuthal spin forces created by the inhomogeneous optical spin of circularly polarised light. At reduced pressures, the unique profile of these rotationally averaged, effective azimuthal forces results in the formation of nano-scale limit cycles. We demonstrate feedback cooling of these non-equilibrium oscillators, resulting in effective temperatures on the order of a milliKelvin. The principles we elaborate here can inform the design of high-stability rotors carrying enhanced centripetal loads or result in more efficient cooling schemes for autonomous limit cycle oscillations. Ultimately, this latter development could provide experimental access to non-equilibrium quantum effects within the mesoscopic regime.
dc.relation.ispartofCommunications Physicsen
dc.rightsCopyright © The Author(s) 2023. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
dc.titleCooling the optical-spin driven limit cycle oscillations of a levitated gyroscopeen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. Centre for Biophotonicsen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Sir James Mackenzie Institute for Early Diagnosisen
dc.contributor.institutionUniversity of St Andrews. Institute of Behavioural and Neural Sciencesen
dc.contributor.institutionUniversity of St Andrews. Biomedical Sciences Research Complexen
dc.description.statusPeer revieweden

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