Solitary Wave States Maintained by Stochastic Direction Changes in a Population of Self-Propelled Particles

Kazuya Ishibashi, Hidetsugu Sakaguchi

Research output: Contribution to journalArticlepeer-review

Abstract

We study solitary wave states of self-propelled particles in the Ising-type Vicsek model. A strongly localized state appears after the rapid direction change of collective motion in the one-dimensional Ising-type Vicsek model. It is shown that this phenomenon occurs by the nucleation of a small population moving in the opposite direction and the subsequent sweeping-up process. This formation mechanism of the solitary wave state is different from the motility-induced phase separation. The solitary wave states maintained by stochastic direction changes also appear on triangular and square lattices in two dimensions.

Original languageEnglish
Article number034003
Journaljournal of the physical society of japan
Volume91
Issue number3
DOIs
Publication statusPublished - Mar 15 2022

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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