Percolation transition in phase separating active fluid

Abstract

The motility-induced phase separation exhibited by active particles with repulsive interactions is well known. We show that the interaction softness of active particles destabilizes the highly ordered dense phase, leading to the formation of a porous cluster which spans the system. This \emph{soft limit} can also be achieved if the particle motility is increased beyond a critical value, at which the system clearly exhibits all the characteristics of a standard percolation transition. We also show that in the athermal limit, active particles exhibit similar transitions even at low motility. With these additional new phases, the phase diagram of repulsive active particles is revealed to be richer than what was previously conceived.

arXiv comment10 pages, 13 figures

References in corpus (36)

• Novel type of phase transition in a system of self-driven particles
• Collective motion
• The Mechanics and Statistics of Active Matter
• Motility-Induced Phase Separation
• Dynamical clustering and phase separation in suspensions of self-propelled colloidal particles
• Athermal Phase Separation of Self-Propelled Particles with no Alignment
• Scale-free correlations in bird flocks
• Emergence of macroscopic directed motion in populations of motile colloids
• The 2019 Motile Active Matter Roadmap
• A continuum theory of phase separation kinetics for active Brownian particles
• Phase behaviour of active Brownian particles: The role of dimensionality
• Computational models for active matter
• Full phase diagram of active Brownian disks: from melting to motility-induced phase separation
• Minimal model for active nematics: quasi-long-range order and giant fluctuations
• Freezing and phase separation of self-propelled disks
• Relevance of Metric-Free Interactions in Flocking Phenomena
• Dynamics of Self-Propelled Particles Under Strong Confinement
• Cooperative Motion of Active Brownian Spheres in Three-Dimensional Dense Suspensions
• Spontaneous velocity alignment in Motility-induced Phase Separation
• Reentrant Phase Behavior in Active Colloids with Attraction
• Motility-induced temperature difference in coexisting phases
• Traffic jams, gliders, and bands in the quest for collective motion
• Interrupted Motility Induced Phase Separation in Aligning Active Colloids
• Motility-Induced Microphase and Macrophase Separation in a Two-Dimensional Active Brownian Particle System
• Thermodynamic phases in two-dimensional active matter
• Dynamical mean-field theory and weakly non-linear analysis for the phase separation of active Brownian particles
• Emergent comet-like swarming of optically driven thermally active colloids
• Self-Organized Critical Coexistence Phase in Repulsive Active Particles
• Active particles under confinement: Aggregation at the wall and gradient formation inside a channel
• Spatial Structures and Giant Number Fluctuations in Models of Active Matter
• Non-Equilibrium Surface Tension of the Vapour-Liquid Interface of Active Lennard-Jones Particles
• Dynamical Crystallites of Active Chiral Particles
• Active-Particle Polarization Without Alignment Forces
• Morphological transitions of active Brownian particle aggregates on porous walls
• Influence of interaction softness in phase separation of active particles
• Clustering and anisotropic correlated percolation in polar flocks

Cited by in corpus (7)

• Motility induced phase separation of deformable cells
• Re-entrant percolation in active Brownian hard disks
• AMEP: The Active Matter Evaluation Package for Python
• Active wetting transitions induced by rotational noise at solid interfaces
• Percolation transitions in the binary mixture of active Brownian particles with different softness
• Effect of the background flow on the motility induced phase separation
• Active adaptolates: motility-induced percolating structures with an adaptive packing geometry