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Pawel Romanczuk: „Collective motion due to escape and pursuit interaction”
Institut für Physik, AG Stochastische Prozesse / SFB555, Universität Berlin

Recent studies suggest that non-cooperative behavior such as cannibalism may be a driving mechanism of collective motion. Motivated by these novel results we introduce a simple model of Brownian particles interacting by biologically motivated pursuit and escape interactions. We show the onset of collective motion for both interaction types and analyze their impact on the global dynamics. We demonstrate a strong dependence of experimentally accessible macroscopic observables on the relative strength of escape and pursuit, determine the scaling of the migration speed with model parameters and present a mean field description. Furthermore we will discuss implications of new experimental results and predictions from model calculations