Simulation of active Brownian particles in optical potentials

Date
2014
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Source Title
Proceedings of SPIE Vol. 9164, Optical Trapping and Optical Micromanipulation XI
Print ISSN
0277-786X
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Publisher
SPIE
Volume
9164
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Pages
1 - 5
Language
English
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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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