Dynamical anomalies and structural features of Active Brownian Particles characterised by two repulsive length scales
Abstract
In this work we study a two-dimensional system composed by Active Brownian Particles (ABPs) interacting via a repulsive potential with two-length-scales, a soft shell and a hard-core. Depending on the ratio between the strength of the soft shell barrier and the activity, we find two regimes: If this ratio is much larger or smaller than 1, the observed behaviour is comparable with ABPs interacting via a single length-scale potential. If this ratio is similar to 1, the two length-scales are relevant for both structure and dynamical properties. On the structural side, when the system exhibits a motility induced phase separation, the dense phase is characterised by new and more complex structures compared with the hexatic phase observed in single length-scale systems. On the dynamical side, as far as we are aware, this is the first representation of an anomalous dynamics in active particles.
Keywords
Cite
@article{arxiv.2202.03768,
title = {Dynamical anomalies and structural features of Active Brownian Particles characterised by two repulsive length scales},
author = {Jose Martin-Roca and Raul Martinez and Fernando Martinez-Pedrero and Jorge Ramirez and Chantal Valeriani},
journal= {arXiv preprint arXiv:2202.03768},
year = {2024}
}