https://doi.org/10.1140/epjst/e2014-02191-1
Regular Article
Traveling bands in self-propelled soft particles
1 Department of Physics, The University of Tokyo, Tokyo 113-0033, Japan
2 Soft Matter Center, Ochanomizu University, Tokyo 112-0012, Japan
3 Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan
Received: 9 January 2014
Revised: 14 April 2014
Published online: 12 June 2014
One of the characteristic features of interacting self-propelled particles is that homogeneous ordered state is unstable near the order-disorder transition thereshold. Traveling bands are formed spontaneously as a localized dynamical structure. Since there is no counter state in phase transitions in thermal equilibrium, to study the properties of traveling bands is of great importance from the view point of nonlinear dynamics far from equilibrium. Based on numerical simulations in two dimensions, we discuss three kinds of traveling bands, normal band, inverse band and robust band, each of which appears in different conditions. One of our recent findings is that the robust traveling bands survive head-on collisions.
© EDP Sciences, Springer-Verlag, 2014
