Diversity of phase transitions and phase separations in active fluids

Abstract

Active matter is not only indispensable to our understanding of diverse biological processes, but also provides a fertile ground for discovering novel physics. Many emergent properties impossible for equilibrium systems have been demonstrated in active systems. These emergent features include motility-induced phase separation, long-ranged ordered (collective motion) phase in two dimensions, and order-disorder phase co-existences (banding and reverse-banding regimes). Here, we unify these diverse phase transitions and phase co-existences into a single formulation based on generic hydrodynamic equations for active fluids. We also reveal a novel co-moving co-existence phase and a putative novel critical point.

6 pages of main text plus 10 pages of supplemental material

References in corpus (18)

• Novel type of phase transition in a system of self-driven particles
• Motility-Induced Phase Separation
• Meso-scale turbulence in living fluids
• Statistical Mechanics of Interacting Run-and-Tumble Bacteria
• Collective motion of self-propelled particles interacting without cohesion
• Hydrodynamic equations for self-propelled particles: microscopic derivation and stability analysis
• Pattern formation in self-propelled particles with density-dependent motility
• Enhanced diffusion and ordering of self-propelled rods
• Hydrodynamics of self-propelled hard rods
• From Phase to Micro-Phase Separation in Flocking Models: The Essential Role of Non-Equilibrium Fluctuations
• Spontaneous velocity alignment in Motility-induced Phase Separation
• Traffic jams, gliders, and bands in the quest for collective motion
• Boltzmann-Ginzburg-Landau approach for continuous descriptions of generic Vicsek-like models
• Minimal continuum theories of structure formation in dense active fluids
• Critical Phenomenon of the Order-Disorder Transition in Incompressible Flocks
• From scalar to polar active matter: Connecting simulations with mean-field theory
• Numerical treatment of the Boltzmann equation for self-propelled particle systems
• Motility-Induced Clustering and Meso-Scale Turbulence in Active Polar Fluids

Cited by in corpus (10)

• Analytical Formulation and Field-Theoretic Simulation of Sequence-Specific Phase Separation of Proteinlike Heteropolymers with Short- and Long-Spatial-Range Interactions
• Active phase separation: new phenomenology from non-equilibrium physics
• Intermittent Attractive Interactions Lead to Microphase Separation in Non-motile Active Matter
• Electrostatics of Salt-Dependent Reentrant Phase Behaviors Highlights Diverse Roles of ATP in Biomolecular Condensates
• Novel critical phenomena in compressible polar active fluids: Dynamical and Functional Renormalization Group Studies
• Entropy production rate in thermodynamically consistent flocks
• Active Jamming at Criticality
• Reentrant phase behavior in binary topological flocks with nonreciprocal alignment
• Phase behaviors and dynamics of active particle systems in double-well potential
• New universality classes govern the critical and multicritical behavior of an active Ising model