Confinement and collective escape of active particles

Abstract

Active matter broadly covers the dynamics of self-propelled particles. While the onset of collective behavior in homogenous active systems is relatively well understood, the effect of inhomogeneities such as obstacles and traps lacks overall clarity. Here, we study how interacting self-propelled particles become trapped and released from a trap. We have found that captured particles aggregate into an orbiting condensate with a crystalline structure. As more particles are added, the trapped condensate escape as a whole. Our results shed light on the effects of confinement and quenched disorder in active matter.

References in corpus (4)

• Novel type of phase transition in a system of self-driven particles
• Fluid dynamics and noise in bacterial cell-cell and cell-surface scattering
• Noise-enhanced trapping in chaotic scattering
• Brownian motion of a circle swimmer in a harmonic trap

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• Collective Vortical Motion and Vorticity Reversals of Self-Propelled Particles on Circularly Patterned Substrates
• Asymptotic analysis and simulation of mean first passage time for active Brownian particles in 1-D
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• Deterministic active particles in the overactive limit
• Local control for the collective dynamics of self-propelled particles
• Trapping Instability of an Active Particle in Steering Potential Fields
• Field-controlled interfacial transport and pinning in an active spin system
• Kinetic description of one-dimensional stochastic dynamics with small inertia