Dresden 2011 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 33: Brownian Motion, Stochastic Processes, Transport I

DY 33.8: Vortrag

Donnerstag, 17. März 2011, 16:00–16:15, HÜL 186

Diffusion of active Brownian particles with coloured angular noise — •Christian Weber and Lutz Schimansky-Geier — Department of Physics, Humboldt Universität zu Berlin, Germany

Motivated by the motion of biological agents we introduce a model of a self-propelled particle with coloured angular noise given by an Ornstein-Uhlenback process (OUP). The consideration of OUP driven noise leads to trajectories which are reminiscent of searching behaviour of animals. We derive analytical results for the angular correlation function and the mean square displacement (MSD). The impact of the correlation time of the OUP on the MSD is discussed for different scalings of the noise intensity in the OUP. A possible connection to polymer physics (worm-like chains) will be briefly discussed.