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The tug-of-war behavior of a Brownian particle in an asymmetric double optical trap with stochastic fluctuations

Author

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  • Long, Fei
  • Zhu, Jia-Pei

Abstract

A Brownian particle optically trapped in an asymmetric double potential surrounded by a thermal bath was simulated. Under the cooperative action of the resultant deterministic optical force and the stochastic fluctuations of the thermal bath, the confined particle undergoes Kramers transition, and oscillates between the two traps with a probability of trap occupancy that is asymmetrically distributed about the midpoint. The simulation results obtained at different temperatures indicate that the oscillation behavior of the particle can be treated as the result of a tug-of-war game played between the resultant deterministic force and the random force. We also employ a bistable model to explain the observed phenomena.

Suggested Citation

  • Long, Fei & Zhu, Jia-Pei, 2018. "The tug-of-war behavior of a Brownian particle in an asymmetric double optical trap with stochastic fluctuations," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 502(C), pages 14-20.
    • Handle: RePEc:eee:phsmap:v:502:y:2018:i:c:p:14-20
    DOI: 10.1016/j.physa.2018.02.086
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