An Introduction to Motility-Induced Phase Separation

Abstract

Active particles may undergo phase separation when interactions oppose self-propulsion, in the absence of any cohesive forces. The corresponding Motility-Induced Phase Separation (MIPS) is arguably the simplest non-trivial collective feature that distinguishes active from passive particles. It is observed in a large variety of systems which we review in this chapter. We describe in depth the case of motile particles interacting via quorum-sensing interactions, whose theoretical framework is by now well-established. We close the chapter by discussing the features observed in systems undergoing MIPS that still challenge our understanding.

Preprint of a chapter in the book "Out-of-Equilibrium Soft Matter: Active Fluids", to be published by the Royal Society of Chemistry

References in corpus (13)

• Motility-Induced Phase Separation
• Statistical Mechanics of Interacting Run-and-Tumble Bacteria
• Nonequilibrium Steady States of Matrix Product Form: A Solver's Guide
• 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
• A self-propelled particle in an external potential: is there an effective temperature?
• Pattern formation in self-propelled particles with density-dependent motility
• Differential Dynamic Microscopy of Bacterial Motility
• Dynamic clustering and chemotactic collapse of self-phoretic active particles
• Traffic jams, gliders, and bands in the quest for collective motion
• Mapping out of equilibrium into equilibrium in one-dimensional transport models
• Phase separation and multibody effects in three-dimensional active Brownian particles
• Active hard-spheres in infinitely many dimensions

Cited by in corpus (10)

• Discovering dynamic laws from observations: the case of self-propelled, interacting colloids
• Diffusion Transients in Motility-Induced Phase Separation
• Dynamical structures in phase-separating non-reciprocal polar active mixtures
• Kinetic temperature and pressure of an active Tonks gas
• Domain Growth Kinetics in Active Binary Mixtures
• Velocity Distribution and Diffusion of an Athermal Inertial Run-and-Tumble Particle in a Shear-Thinning Medium
• Hydrodynamics of a hard-core active lattice gas
• A Taylor swimming sheet under a finite Brinkman layer
• Jamming of active particles in narrow pores: Implications for ratchet effect and diffusion coefficient
• Probing wetting properties with self-propelled droplets