16 September 2014 Simulation of active Brownian particles in optical potentials
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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.
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Giorgio Volpe, Sylvain Gigan, Giovanni Volpe, "Simulation of active Brownian particles in optical potentials", Proc. SPIE 9164, Optical Trapping and Optical Micromanipulation XI, 91642S (16 September 2014); doi: 10.1117/12.2061049; https://doi.org/10.1117/12.2061049
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