Počet záznamů: 1
Stochastic Hopf bifurcations in vacuum optical tweezers
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SYSNO ASEP 0547258 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Stochastic Hopf bifurcations in vacuum optical tweezers Tvůrce(i) Simpson, Stephen Hugh (UPT-D) RID, SAI
Arita, Y. (GB)
Dholakia, K. (GB)
Zemánek, Pavel (UPT-D) RID, SAI, ORCIDCelkový počet autorů 4 Číslo článku 043518 Zdroj.dok. Physical Review A. - : American Physical Society - ISSN 2469-9926
Roč. 104, č. 4 (2021)Poč.str. 13 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova optical trap ; vacuum ; bifurcations ; limit cycles Vědní obor RIV BH - Optika, masery a lasery Obor OECD Optics (including laser optics and quantum optics) CEP GA19-17765S GA ČR - Grantová agentura ČR EF15_003/0000476 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Omezený přístup Institucionální podpora UPT-D - RVO:68081731 UT WOS 000707419400004 EID SCOPUS 85117931313 DOI 10.1103/PhysRevA.104.043518 Anotace The forces acting on an isotropic microsphere in optical tweezers are effectively conservative. However, reductions in the symmetry of the particle or trapping field can break this condition. Here we theoretically analyze the motion of a particle in a linearly nonconservative optical vacuum trap, concentrating on the case where symmetry is broken by optical birefringence, causing nonconservative coupling between rotational and translational degrees of freedom. Neglecting thermal fluctuations, we first show that the underlying deterministic motion can exhibit a Hopf bifurcation in which the trapping point destabilizes and limit cycles emerge whose amplitude grows with decreasing viscosity. When fluctuations are included, the bifurcation of the underlying deterministic system is expressed as a transition in the statistical description of the motion. For high viscosities, the probability distribution is normal, with a kurtosis of three, and persistent probability currents swirl around the stable trapping point. As the bifurcation is approached, the distribution and currents spread out in phase space. Following the bifurcation, the probability distribution function hollows out, reflecting the underlying limit cycle, and the kurtosis halves abruptly. The system is seen to be a noisy self-sustained oscillator featuring a highly uneven limit cycle. A variety of applications, from autonomous stochastic resonance to synchronization, is discussed. Pracoviště Ústav přístrojové techniky Kontakt Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Rok sběru 2022 Elektronická adresa https://journals.aps.org/pra/abstract/10.1103/PhysRevA.104.043518
Počet záznamů: 1