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Cooling the optical-spin driven limit cycle oscillations of a levitated gyroscope
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SYSNO ASEP 0575367 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Cooling the optical-spin driven limit cycle oscillations of a levitated gyroscope Author(s) Arita, Y. (GB)
Simpson, Stephen Hugh (UPT-D) RID, SAI
Bruce, G. D. (GB)
Wright, E. M. (GB)
Zemánek, Pavel (UPT-D) RID, SAI, ORCID
Dholakia, K. (GB)Number of authors 6 Article number 238 Source Title COMMUNICATIONS PHYSICS. - : Nature Publishing Group - ISSN 2399-3650
Roč. 6, č. 1 (2023)Number of pages 7 s. Publication form Online - E Language eng - English Country US - United States Keywords optical levitation ; limit cycle ; gyroscope ; motion cooling Subject RIV BH - Optics, Masers, Lasers OECD category Optics (including laser optics and quantum optics) R&D Projects EF15_003/0000476 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UPT-D - RVO:68081731 UT WOS 001058778400002 EID SCOPUS 85169685984 DOI 10.1038/s42005-023-01336-4 Annotation Birefringent 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. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2024 Electronic address https://www.nature.com/articles/s42005-023-01336-4
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