Scaling behavior of transient dynamics of vortex-like states in self-propelled particles

Pei-fang Wu, Wei-chen Guo, Bao-quan Ai and Liang He

Physica A: Statistical Mechanics and its Applications, 2023, vol. 622, issue C

Abstract: Nonequilibrium many-body transient dynamics play an important role in the adaptation of active matter systems to environmental changes. However, the generic universal behavior of such dynamics is usually elusive and left as open questions. Here, we investigate the transient dynamics of vortex-like states in a two-dimensional active matter system that consists of self-propelled particles with alignment interactions subjected to extrinsic environmental noise. We identify a universal power-law scaling for the average lifetime of vortex-like states with respect to the speed of the self-propelled particles. This universal scaling behavior manifests strong robustness against the noise, up to the level where influences from environmental fluctuations are large enough to directly randomize the moving directions of particles. Direct experimental observations can be readily performed by related experimental setups operated at a decently low noise level.

Keywords: Scaling behavior; Vortex; Self-propelled particles (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:622:y:2023:i:c:s0378437123003771

DOI: 10.1016/j.physa.2023.128822

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