Phys. Rev. Lett. 102, 010602 (2009) - Collective Motion due to Individual Escape and Pursuit Response

Recent studies suggest that noncooperative 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 and determine the scaling of the migration speed with model parameters. DOI:https://doi.org/10.1103/PhysRevLett.102.010602 ©2009 American Physical Society Pawel Romanczuk1, Iain D. Couzin2, and Lutz Schimansky-Geier1,* Vol. 102, Iss. 1 — 9 January 2009 Sign up to receive regular email alerts from Physical Review Letters ISSN 1079-7114 (online), 0031-9007 (print). ©2024 American Physical Society. All rights reserved. Physical Review Letters™ is a trademark of the American

Recent studies suggest that noncooperative 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 and determine the scaling of the migration speed with model parameters. DOI