From scalar to polar active matter: Connecting simulations with mean-field theory
Abstract
We study numerically the phase behavior of self-propelled elliptical particles interacting through the "hard" repulsive Gay-Berne potential at infinite P\'eclet number. Changing a single parameter, the aspect ratio, allows to continuously go from discoid active Brownian particles to elongated polar rods. Discoids show phase separation, which changes to a cluster state of polar domains, which then form polar bands as the aspect ratio is increased. From the simulations, we identify and extract the two effective parameters entering the mean-field description: the force imbalance coefficient and the effective coupling to the local polarization. These two coefficients are sufficient to obtain a complete and consistent picture, unifying the paradigms of scalar and polar active matter.
Keywords
Cite
@article{arxiv.1910.06547,
title = {From scalar to polar active matter: Connecting simulations with mean-field theory},
author = {Ashreya Jayaram and Andreas Fischer and Thomas Speck},
journal= {arXiv preprint arXiv:1910.06547},
year = {2020}
}