Phase segregation of passive advective particles in an active medium

Abstract

Localized contractile configurations or asters spontaneously appear and disappear as emergent structures in the collective stochastic dynamics of active polar actomyosin filaments. Passive parti- cles which (un)bind to the active filaments get advected into the asters, forming transient clusters. We study the phase segregation of such passive advective scalars in a medium of dynamic asters, as a function of the aster density and the ratio of the rates of aster remodeling to particle diffusion. The dynamics of coarsening shows strong violation of Porod behaviour, suggesting diffuse interfaces. The phase segregated steady state shows strongly fluctuations characterized by multiscaling and in- termittency. We expect these unique nonequilibrium features to manifest in the actin-dependent molecular clustering at the cell surface.

5 pages, 4 figures

References in corpus (6)

• The large deviation approach to statistical mechanics
• Burgers Turbulence
• Activity-induced phase separation and self-assembly in mixtures of active and passive particles
• Active nematics are intrinsically phase-separated
• Phase Separation and Emergent Structures in an Active Nematic
• Order parameter scaling in fluctuation dominated phase ordering

Cited by in corpus (22)

• Phase separation in binary mixtures of active and passive particles
• Entrainment dominates the interaction of microalgae with micron-sized objects
• Traveling fronts in active-passive particle mixtures
• Mechanical heterogeneity in tissues promotes rigidity and controls cellular invasion
• Phase behaviour and dynamical features of a two-dimensional binary mixture of active/passive spherical particles
• Emergent Structures in an Active Polar Fluid : dynamics of shape, scattering and merger
• Effective equilibrium states in mixtures of active particles driven by colored noise
• Active emulsions in living cell membranes driven by contractile stresses and transbilayer coupling
• Fluctuation-dominated phase ordering at a mixed order transition
• Large compact clusters and fast dynamics in coupled nonequilibrium systems
• A microscopic field theoretical approach for binary mixtures of active and passive particles
• Coarsening Dynamics in the Vicsek Model of Active Matter
• Ordered phases in coupled nonequilibrium systems: static properties
• Statistical mechanics of a single active slider on a fluctuating interface
• Clustering, intermittency and scaling for passive particles on fluctuating surfaces
• Light and heavy particles on a fluctuating surface: Bunchwise balance, irreducible sequences and local density-height correlations
• Active Segregation Dynamics in the Living Cell
• Time evolution of intermittency in the passive slider problem
• Fluctuation dominated phase ordering in coarse-grained depth models: Domain wall structures, extreme values and coarsening
• Enzyme-driven phase separation
• A Novel Mechanism of Ordering in a Coupled Driven System: Vacancy Induced Phase Separation
• Effective single component description of steady state structures of passive particles in an active bath