Formation and collision of traveling bands in interacting deformable self-propelled particles

TL;DR

This paper investigates how deformable self-propelled particles form and sustain traveling bands through local density-dependent velocity, demonstrating band formation and collision resilience in simulations.

Contribution

It introduces a model of deformable particles with density-dependent velocity, showing band formation and collision survival, extending previous Vicsek-type models.

Findings

Traveling bands form easily due to local density dependence.

Stripe bands survive head-on collisions and re-form.

Deformability influences collective band dynamics.

Abstract

We study collective dynamics of interacting deformable self-propelled particles whose migration velocity increases when the local density of particles is increased. Numerical simulations in two dimensions reveal that traveling bands similar to those found previously in the Vicsek-type model is easily formed by this local density dependence of the migration velocity. We show that a pair of stripe bands which are traveling to the opposite directions is not destructed by a head-on collision but survives again after collision.