Hopping on a zig-zag course |
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| Authors: | L Haeggqwist L Schimansky-Geier I M Sokolov F Moss |
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| Institution: | 1.Institute of Physics, Humboldt-University at Berlin,Berlin,Germany;2.Center for Neurodynamics, University of Missouri at St. Louis,St. Louis,USA |
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| Abstract: | We study the diffusion coefficient of Active Brownian particles in
two dimensions. In addition to usual attributes of active motion we
let the particles turn in preferred directions over random times.
This angular motion is modeled by an effective Lorentz force with
time dependent frequency switching between two values at
exponentially distributed random times. The diffusion coefficient is
calculated by the Taylor-Kubo formula where distributions found from
a Fokker-Planck equation or from a continuous time random walk
approach have been inserted for averaging. Eventually properties
of the diffusion coefficient will be discussed. |
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