Green-Kubo approach to the average swim speed in active Brownian systems

Sharma, Abhinav; Brader, Joseph M.

doi:10.1063/1.4966153

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Journal article

Green-Kubo approach to the average swim speed in active Brownian systems

Sharma, Abhinav Department of Physics, University of Fribourg, Switzerland
Brader, Joseph M. Department of Physics, University of Fribourg, Switzerland

24.10.2016

Published in:

The Journal of Chemical Physics. - 2016, vol. 145, no. 16, p. 161101

English We develop an exact Green-Kubo formula relating nonequilibrium averages in systems of interacting active Brownian particles to equilibrium time-correlation functions. The method is applied to calculate the density-dependent average swim speed, which is a key quantity entering coarse grained theories of active matter. The average swim speed is determined by integrating the equilibrium autocorrelation function of the interaction force acting on a tagged particle. Analytical results are validated using Brownian dynamics simulations.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

Language