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      Simulation of active Brownian particles in optical potentials

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      Author
      Volpe, G.
      Gigan, S.
      Volpe, Giovanni
      Date
      2014
      Source Title
      Proceedings of SPIE Vol. 9164, Optical Trapping and Optical Micromanipulation XI
      Print ISSN
      0277-786X
      Publisher
      SPIE
      Volume
      9164
      Pages
      1 - 5
      Language
      English
      Type
      Conference Paper
      Item Usage Stats
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      Abstract
      Optical forces can affect the motion of a Brownian particle. For example, optical tweezers use optical forces to trap a particle at a desirable position. Unlike passive Brownian particles, active Brownian particles, also known as microswimmers, propel themselves with directed motion and thus drive themselves out of equilibrium. Understanding their motion in a confined potential can provide insight into out-of-equilibrium phenomena associated with biological examples such as bacteria, as well as with artificial microswimmers. We discuss how to mathematically model their motion in an optical potential using a set of stochastic differential equations and how to numerically simulate it using the corresponding set of finite difference equations.
      Keywords
      Optical forces
      Brownian motion
      Stochastic differential equations
      Numerical simulations
      Active Brownian particles
      Microswimmers
      Permalink
      http://hdl.handle.net/11693/27866
      Published Version (Please cite this version)
      http://dx.doi.org/10.1117/12.2061049
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      • Department of Physics 2299
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