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Synchronization of spin-driven limit cycle oscillators optically levitated in vacuum
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SYSNO ASEP 0579366 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Synchronization of spin-driven limit cycle oscillators optically levitated in vacuum Author(s) Brzobohatý, Oto (UPT-D) RID, ORCID, SAI
Duchaň, Martin (UPT-D) SAI
Jákl, Petr (UPT-D) RID, ORCID, SAI
Ježek, Jan (UPT-D) RID, ORCID, SAI
Šiler, Martin (UPT-D) RID, ORCID, SAI
Zemánek, Pavel (UPT-D) RID, SAI, ORCID
Simpson, Stephen Hugh (UPT-D) RID, SAINumber of authors 7 Article number 5441 Source Title Nature Communications. - : Nature Publishing Group
Roč. 14, č. 1 (2023)Number of pages 10 s. Publication form Online - E Language eng - English Country US - United States Keywords optical levitation ; optical binding ; synchronization Subject RIV BH - Optics, Masers, Lasers OECD category Optics (including laser optics and quantum optics) R&D Projects GF21-19245K GA ČR - Czech Science Foundation (CSF) EF16_026/0008460 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UPT-D - RVO:68081731 UT WOS 001188123900001 EID SCOPUS 85169895134 DOI 10.1038/s41467-023-41129-5 Annotation We explore, experimentally and theoretically, the emergence of coherent coupled oscillations and synchronization between a pair of non-Hermitian, stochastic, opto-mechanical oscillators, levitated in vacuum. Each oscillator consists of a polystyrene microsphere trapped in a circularly polarized, counter-propagating Gaussian laser beam. Non-conservative, azimuthal forces, deriving from inhomogeneous optical spin, push the micro-particles out of thermodynamic equilibrium. For modest optical powers each particle shows a tendency towards orbital circulation. Initially, their stochastic motion is weakly correlated. As the power is increased, the tendency towards orbital circulation strengthens and the motion of the particles becomes highly correlated. Eventually, centripetal forces overcome optical gradient forces and the oscillators undergo a collective Hopf bifurcation. For laser powers exceeding this threshold, a pair of limit cycles appear, which synchronize due to weak optical and hydrodynamic interactions. In principle, arrays of such Non-Hermitian elements can be arranged, paving the way for opto-mechanical topological materials or, possibly, classical time crystals. In addition, the preparation of synchronized states in levitated optomechanics could lead to new and robust sensors or alternative routes to the entanglement of macroscopic objects. 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/s41467-023-41129-5
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