Correlated and anti-correlated density dependent motility

TL;DR

This paper investigates how particles with density-dependent motility behave under different correlation rules, revealing phase transitions and steady states through Langevin dynamics simulations.

Contribution

It introduces a novel analysis of systems with density-dependent motility, classifying steady states and explaining phase transitions for correlated and anti-correlated cases.

Findings

Identification of distinct steady states for correlated and anti-correlated cases

Explanation of principal phase transitions in density-dependent motility systems

Suggestions for future research directions in active matter dynamics

Abstract

I study via Langevin dynamics simulations two opposite cases of systems of particles that alternate their identity according to density dependent motility (DDM) rules and interact via a soft repulsive potential. In the correlated case, dilute regions are passive and dense regions are active, while in the anti-correlated case, dilute regions are active and dense regions are passive. I classify the emerging steady states, explain the principal phase transitions, and finally suggest directions for further investigation.