Spontaneous Micro Flocking of Active Inertial Particles without Alignment Interaction

2024/02/06 by Subhajit Paul, Paul, Subhajit, Suman Majumder +3 · 1 citation
Engineering · Physics and Astronomy · #FOS: Physical sciences #Micro and Nano Robotics #Modular Robots and Swarm Intelligence #Particle Dynamics in Fluid Flows #Soft Condensed Matter (cond-mat.soft)

paper · pdf · doi:10.48550/arxiv.2402.04397

openalex publication_date 2024/02/06 · openalex created_date 2024/02/09 · openalex updated_date 2026/08/01

Abstract

Observing spontaneous velocity ordering or flocking during motility induced phase separation (MIPS) in a system of spherical active Brownian particles without alignment interaction is challenging. We take up this problem by performing simulations of spherical active inertial particles with purely repulsive potential in presence of thermal noise and absence of any explicit alignment interaction. Our results not only show the presence of MIPS, but also reveal a micro-flocking transition. We characterize this transition in terms of a velocity order parameter as well as a characteristic length scale derived from the spatial correlation of the velocities.

Cited by

• Attraction-Induced Cluster Fragmentation and Local Alignment in Active Particle Systems

Related

• Phase Separation in Systems of Interacting Active Brownian Particles
• An Introduction to Motility-Induced Phase Separation
• Collective motion of Active Brownian Particles with polar alignment
• Cooling mechanism controls motility-induced phase separation in inertial active liquids
• Inertial Effects on Kinetics of Motility-Induced Phase Separation