Pattern formation in self-propelled particles with density-dependent motility

Abstract

We study the behaviour of interacting self-propelled particles, whose self-propulsion speed decreases with their local density. By combining direct simulations of the microscopic model with an analysis of the hydrodynamic equations obtained by explicitly coarse graining the model, we show that interactions lead generically to the formation of a host of patterns, including moving clumps, active lanes and asters. This general mechanism could explain many of the patterns seen in recent experiments and simulations.

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Cited by in corpus (16)

• Motility-Induced Phase Separation
• When are active Brownian particles and run-and-tumble particles equivalent? Consequences for motility-induced phase separation
• Pressure and Phase Equilibria in Interacting Active Brownian Spheres
• From Phase to Micro-Phase Separation in Flocking Models: The Essential Role of Non-Equilibrium Fluctuations
• Active colloidal suspensions: Clustering and phase behavior
• Motility-induced phase separation and coarsening in active matter
• Boltzmann-Ginzburg-Landau approach for continuous descriptions of generic Vicsek-like models
• Critical Phenomenon of the Order-Disorder Transition in Incompressible Flocks
• Activity-induced clustering in model dumbbell swimmers: The role of hydrodynamic interactions
• Phase Separation and Emergent Structures in an Active Nematic
• Numerical treatment of the Boltzmann equation for self-propelled particle systems
• Synchronization and collective motion of globally coupled Brownian particles
• Braiding a flock: winding statistics of interacting flying spins
• Discussion on Ohta et al., "Traveling bands in self-propelled soft particles"
• Pattern-Acquisition in Finite, Heterogenous, Delay-Coupled Swarms
• Noise Induced Pattern Switching in Randomly Distributed Delayed Swarm Patterns