Berlin 2012 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
DY: Fachverband Dynamik und Statistische Physik
DY 29: Posters II
DY 29.17: Poster
Thursday, March 29, 2012, 17:00–19:00, Poster A
Mean-field theory of Active Brownian particles with velocity-alignment — •Robert Großmann1, Pawel Romanczuk1,2, and Lutz Schimansky-Geier1 — 1Department of Physics, Humboldt-Universität zu Berlin, Newtonstraße 15, 12439 Berlin, Germany — 2Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Straße 38, 01187 Dresden, Germany
A model of active Brownian particles with velocity-alignment in two spatial dimensions is introduced. The individual dynamics is based on the so called Schienbein-Gruler model as well as thermal and active fluctuations. A macroscopic description is derived directly from the microscopic Langevin dynamics via a nonlinear Fokker-Planck equation and a moment expansion of the corresponding probability density function. We discuss the impact of different fluctuation types on the onset of collective motion, i.e. noise induced bistabilities.