State behaviour and dynamics of self-propelled Brownian squares: a simulation study.

Prymidis, Vasileios; Samin, Sela; Filion, Laura · Soft Matter · 2016

basic_science · Level V

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Abstract

We study the state behaviour of self-propelled and Brownian squares as a function of the magnitude of self-propulsion and density using Brownian dynamics simulations. We find that the system undergoes a transition from a fluid state to phase coexistence with increased self-propulsion and density. Close to the transition we find oscillations of the system between a fluid state and phase coexistence that are caused by the accumulation of forces in the dense phase. Finally, we study the coarsening regime of the system and find super-diffusive behaviour.