Athermal Phase Separation of Self-Propelled Particles with no Alignment

Abstract

We study numerically and analytically a model of self-propelled polar disks on a substrate in two dimensions. The particles interact via isotropic repulsive forces and are subject to rotational noise, but there is no aligning interaction. As a result, the system does not exhibit an ordered state. The isotropic fluid phase separates well below close packing and exhibits the large number fluctuations and clustering found ubiquitously in active systems. Our work shows that this behavior is a generic property of systems that are driven out of equilibrium locally, as for instance by self propulsion.

5 pages, 4 figures

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• Response of active Brownian particles to boundary driving
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• Re-entrant phase separation in nematically aligning active polar particles
• Additivity, density fluctuations, and nonequilibrium thermodynamics for active Brownian particles
• Density and Polarization of Active Brownian Particles in Curved Activity Landscapes
• Selecting active matter according to motility in an acoustofluidic setup: Self-propelled particles and sperm cells
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• Microscopic field theory for structure formation in systems of self-propelled particles with generic torques
• A kinetic-Monte Carlo perspective on active matter
• Nonequilibrium steady state of trapped active particles
• Self-assembly of active core corona particles into highly ordered and self-healing structures
• Universal reshaping of arrested colloidal gels via active doping
• Statistical properties of microphase and bubbly phase-separated active fluids
• Phase separation of active Brownian particles on curved surfaces
• Individual and collective dynamics of self-propelled soft particles
• Polar order, shear banding, and clustering in confined active matter
• A Quantitative Kinetic Theory of Flocking with Three-Particle-Closure
• Statistical Field Theory and Effective Action Method for scalar Active Matter
• Diffusion Transients in Motility-Induced Phase Separation
• Dynamic Phases, Clustering, and Lane Formation for Driven Disk Systems in the Presence of Quenched Disorder
• The most probable path of Active Ornstein-Uhlenbeck particles
• Interacting particles in an activity landscape
• Fluctuations of rotational and translational degrees of freedom in an interacting active dumbbell system
• Shear Induced Orientational Ordering in Active Glass
• Enhanced diffusivity in microscopically reversible active matter
• Motion of active tracer in a lattice gas with cross-shaped particles
• Work Fluctuations in the Active Ornstein- Uhlenbeck Particle model
• Kinetic Monte-Carlo Algorithms for Active-Matter systems
• Alignment interactions drive structural transitions in biological tissues
• Orbital Magnetism of Active Viscoelastic Suspension
• The impact of contact inhibition on collective cell migration and proliferation
• Time-dependent properties of run-and-tumble particles. II.: Current fluctuations
• Instantaneous Normal Modes Reveal Structural Signatures for the Herschel-Bulkley Rheology in Sheared Glasses
• Isomorph theory beyond thermal equilibrium
• Controlling the transport of active matter in disorderd lattices of asymmetrical obstacles
• Percolation transition in phase separating active fluid
• Biased ensembles of pulsating active matter
• Most probable path of an active Brownian particle
• Effect of the orientational relaxation on the collective motion of patterns formed by self-propelled particles
• Dynamical structures in phase-separating non-reciprocal polar active mixtures
• Interplay between jamming and MIPS in persistent self-propelling particles
• Active Matter Shepherding and Clustering in Inhomogeneous Environments
• Simulating wet active polymers by multiparticle collision dynamics
• Binary phase separation in a collection of self-propelled particle with variable speed
• Sampling rare fluctuations of discrete-time Markov chains
• Data-driven model construction for anisotropic dynamics of active matter
• Motility-induced clustering of active particles under soft confinement
• Two floating camphor particles interacting through lateral capillary force
• Dynamical anomalies and structural features of Active Brownian Particles characterised by two repulsive length scales
• Long-range order in two-dimensional systems with fluctuating active stresses
• Collective behavior of squirmers in thin films
• The "isothermal" compressibility of active matter
• Polar swimmers induce several phases in active nematics
• Thermodynamic constraints on the nonequilibrium response of one-dimensional diffusions
• Effect of Confinement and Topology: 2-TIPS vs MIPS
• Escape dynamics of a self-propelled nanorod from circular confinements with narrow openings
• Effects of local curvature on epithelia tissue -- coordinated rotational movement and other spatiotemporal arrangements
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• Tuning attraction and repulsion between active particles through persistence
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• Pattern Formation and Transport for Externally Driven Active Matter on Periodic Substrates
• Vorticity phase separation and defect lattices in the isotropic phase of active liquid crystals
• Alignment-Induced Self-Organization of Autonomously Steering Microswimmers: Turbulence, Vortices, and Jets
• Collective Hall current in chiral active fluids: Coupling of phase and mass transport through traveling bands
• Characterizing Different Motility Induced Regimes in Active Matter with Machine Learning and Noise
• GPU parallel simulation algorithm of Brownian particles with excluded volume using Delaunay triangulations
• The Influence of Particle Softness on Active Glassy Dynamics
• Inertia drives concentration-wave turbulence in swimmer suspensions
• Emergent Synchronization and Flocking in Purely Repulsive Self-Navigating Particles
• Single-File Diffusion of Active Brownian Particles
• Uncovering novel phase transitions in dense dry polar active fluids using a lattice Boltzmann method
• Turbulence-induced clustering in compressible active fluids
• Aging or DEAD: origin of the non-monotonic response to weak self-propulsion in active glasses
• Statistical Mechanics and Hydrodynamics of Self-Propelled Hard Spheres
• Kinetic temperature and pressure of an active Tonks gas
• Single active particle engine utilizing a non-reciprocal coupling between particle's position and self-propulsion
• Perpendicular and Parallel Phase Separation in Two Species Driven Diffusive Lattice Gases
• Collective dynamics of active dumbbells near a circular obstacle
• Towards a liquid-state theory for active matter
• Nematic Torques in Scalar Active Matter: when Fluctuations Favor Polar Order and Persistence
• Bulk condensation by an active interface
• Glassy Dynamics of Brownian Particles with Velocity-Dependent Friction
• Anisotropic run-and-tumble-turn dynamics
• When does an active bath behave as an equilibrium one?
• Inhomogeneous entropy production in active crystals with point imperfections
• Exact hydrodynamics and onset of phase separation for an active exclusion process
• How motility affects Ising transitions
• Dynamic Overlap Concentration Scale of Active Colloids
• Active cluster crystals
• Domain Growth in the Active Model B: Critical and Off-critical Composition
• Fluctuating hydrodynamics of active particles interacting via taxis and quorum sensing: static and dynamics
• Time-dependent properties of run-and-tumble particles: Density relaxation
• Self-diffusive dynamics of active Brownian particles at moderate densities
• Future Directions for Active Matter on Ordered Substrates
• Transition from Susceptible-Infected to Susceptible-Infected-Recovered Dynamics in a Susceptible-Cleric-Zombie-Recovered Active Matter Model
• Spontaneous trail formation in populations of auto-chemotactic walkers
• Frictional Active Brownian Particles
• Dynamical properties of different models of elastic polymer rings: confirming the link between deformation and fragility
• Alignment Destabilizes Crystal Orders in Active Systems
• Effect of reorientation statistics on torque response of self propelled particles
• Optimal Control in Soft and Active Matter
• Re-entrant percolation in active Brownian hard disks
• Active particle in a harmonic trap driven by a resetting noise: an approach via Kesten variables
• Impact of non-reciprocal interactions on colloidal self-assembly with tunable anisotropy
• Self-propulsion and self-navigation: Activity is a precursor to jamming
• An equation of state for active matter
• Motility-Induced Pinning in Flocking System with Discrete Symmetry
• Theory of Nonequilibrium Multicomponent Coexistence
• Polarization and dynamic phases of aligning active matter in periodic obstacle arrays
• Interfacial and density fluctuations in a lattice model of motility-induced phase separation
• Binary Mixtures in Linear Convection Arrays
• Entropy production of active Brownian particles going from liquid to hexatic and solid phases
• Active Phases for Particles on Resource Landscapes
• Site-percolation transition of run-and-tumble particles
• Emergent clustering due to quorum sensing interactions in active matter
• Active Jamming at Criticality
• Active Young-Dupré Equation: How Self-organized Currents Stabilize Partial Wetting
• Collective motion of granular matter subjected to swirling excitation
• Collective Cell Movement in Cell-Scale Tension Gradient on Tissue Interface
• Vectorial active matter on the lattice: polar condensates and nematic filaments
• Active-passive mixtures with bulk loading: a minimal active engine in one dimension
• Geometric and Nonequilibrium Criticality in Run-and-Tumble Particles with Competing Motility and Attraction
• Active wetting transitions induced by rotational noise at solid interfaces
• Dynamical patterns and nonreciprocal effective interactions in an active-passive mixture through exact hydrodynamic analysis
• Active Brownian particle under stochastic position and orientation resetting in a harmonic trap
• Aggregation of self-propelled particles with sensitivity to local order
• Recovery of mechanical pressure in a gas of underdamped active dumbbells with Brownian noise
• Effect of anisotropy on the formation of active particle films
• Guided run-and-tumble active particles: wall accumulation and preferential deposition
• Active doping controls the mode of failure in dense colloidal gels
• The coherent motions of thermal active Brownian particles
• Self-organization of active colloids mediated by chemical interactions
• Transient Pattern Formation in an Active Matter Contact Poisoning Model
• Diffusion dynamics of an overdamped active ellipsoidal particle in two dimensions
• Propagating irreversibility fronts in cyclically-sheared suspensions
• Biased motility-induced phase separation: from chemotaxis to traffic jams
• AMEP: The Active Matter Evaluation Package for Python
• Mechanical inhibition of dissipation in a thermodynamically consistent active solid
• Simple mathematical model for a pairing-induced motion of active and passive particles
• Velocity Distribution and Diffusion of an Athermal Inertial Run-and-Tumble Particle in a Shear-Thinning Medium
• Theory of Nonequilibrium Coexistence with Coupled Conserved and Nonconserved Order Parameters
• Vicsek Model Meets DBSCAN: Cluster Phases in the Vicsek Model
• Motility-dependent selective transport of active matter in trap arrays: Separation methods based on trapping-detrapping and deterministic lateral displacement
• Liquid-Hexatic-Solid phases in active and passive Brownian particles determined by stochastic birth and death events
• Theory for the Anomalous Phase Behavior of Inertial Active Brownian Particles
• Phase behaviour of active particles in block copolymer melts
• Additivity and density fluctuations in Vicsek-like models of self-propelled particles
• Thermodynamic nature of irreversibility in active matter
• Phase behaviors and dynamics of active particle systems in double-well potential
• Role of intercellular adhesion in modulating tissue fluidity
• Confined active particles with spatially dependent Lorentz force: an odd twist to the "best Fokker-Planck approximation"
• Effect of speed fluctuations on the collective dynamics of active disks
• Active fluids form system-spanning filamentary networks
• Synchronized Rotations of Active Particles on Chemical Substrates
• Geometric view of stochastic thermodynamics for non-equilibrium steady states
• Differences in mechanical properties lead to anomalous phase separation in a model cell co-culture
• Percolation transitions in the binary mixture of active Brownian particles with different softness
• Non-equilibrium phase transitions in active rank diffusions
• Emergence of Local Ordering and Mesoscale Giant Number Fluctuations in Active Turbulence
• Field Theory of Active Brownian Particles with Dry Friction
• Repulsive torques alone trigger crystallization of constant speed active particles
• Hydrodynamics of Active Lévy Matter
• Irreversibility and Chaos in Active Particle Suspensions
• Mobility-induced phase separation in a binary mixture of active Brownian particles
• Velocity Distribution and Diffusion of an Athermal Inertial Run-and-Tumble Particle in a Shear-Thickening Medium
• Shearing effects on the phase coarsening of binary mixtures using the Active Model B
• Spontaneous collective transport in a heat--bath
• Fluctuating Hydrodynamics Describes Transport in Cellular Aggregates
• Anti-hyperuniform Critical States of Active Topological Defects
• Experimental Modeling of Chiral Active Robots and a Minimal Model of Non-Gaussian Displacements
• The influence of active agent motility on SIRS epidemiological dynamics
• Nonequilibrium dynamical structure of a dilute suspension of active particles in a viscoelastic fluid
• Phases of active matter in two dimensions
• Occurrence of connected clusters in motility-induced phase-separated states of persistent active particles at zero temperature
• Most probable paths for active Ornstein-Uhlenbeck particles
• Self-organised structures in mixed active-passive suspensions due to hydrodynamic interactions
• Pattern Formation and Flocking for Particles Near the Jamming Transition on Resource Gradient Substrates
• Active control of transport through nanopores
• Identifying the mechanism for superdiffusivity in mouse fibroblast motility
• Controlling local order of athermal self-propelled particles
• Active Lévy Matter: Anomalous Diffusion, Hydrodynamics and Linear Stability
• Crossover dynamics and non-Gaussian fluctuations in inertial active chains
• Structural fluctuations in active glasses
• Phase separation of chemokinetic active particles
• Two-Dimensional Active Brownian Particles Crossing a Parabolic Barrier: Finite Rectangular Domain with Absorbing Boundary Conditions
• Crystal to liquid cross-over for active particles with inverse-square power-law interaction
• Effective Energy, Interactions And Out Of Equilibrium Nature Of Scalar Active Matter
• Nonmonotonic diffusion in sheared active suspensions of squirmers
• Bubble formation in active binary mixture model
• Anomaly, class division, and decoupling in income dynamics
• Jerky chiral active particles
• Flocking and spreading dynamics in populations of self-propelled agents
• Two-Dimensional Active Brownian Particles Crossing a Parabolic Barrier: Transition-Path Times, Survival Probability, and First-Passage Time
• Transverse Self-Propulsion Enhances the Aggregation of Active Dumbbells
• Persistent exclusion process with time-periodic drive
• Dynamical response of a system of passive or active swimmers to time-periodic forcing
• Escape rate of an active Brownian particle in a rough potential
• Correlated escape of active particles across a potential barrier
• Phase separation of self-propelled disks with ferromagnetic and nematic alignment
• An Infinite Set of Integral Formulae for Polar, Nematic, and Higher Order Structures at the Interface of Motility-Induced Phase Separation
• Virial stress in systems of active Brownian particles in the presence of translational and rotational inertia
• Machine learning analysis of dimensional reduction conjecture for nonequilibrium Berezinskii-Kosterlitz-Thouless transition in three dimensions
• Beyond the Markovian limit: Exact solutions for active motion in a power-law viscoelastic bath
• Active Cahn-Hilliard theory for nonequilibrium phase separation: quantitative macroscopic predictions and a microscopic derivation
• Kinetic Event-Chain Algorithm for Active Matter
• Mass-based separation of active Brownian particles in an asymmetric channel
• Non-equilibrium pathways between cluster morphologies in active phase separation: necking, rupture and cavitation
• Controlling Vortex Rotation in Dry Active Matter
• Brownian motion in a growing population of ballistic particles
• Diffusion of gravitactic chiral active Brownian particles in an asymmetric channel
• Structured Interactions Drive Abrupt Transitions in the Spatial Organization of Microbial Communities
• Instabilities and turbulence in extensile swimmer suspensions
• Density-Independent transient caging in the high-density phase of motility-induced phase separation
• Anomalous current fluctuations and mobility-driven clustering
• Critical Motility-Induced Phase Separation in Three Dimensions is Consistent with Ising Universality
• Oscillatory active microrheology of active suspensions
• Active ploughing through a compressible viscoelastic fluid: Unjamming and emergent nonreciprocity
• Estimation of spatial and time scales of collective behaviors of active matters through learning hydrodynamic equations from particle dynamics
• Hydrodynamics of simple active liquids: the emergence of velocity correlations
• Effect of the background flow on the motility induced phase separation
• Configurational Entropy of Self Propelled Glass Formers
• Long-ranged velocity correlations in dense systems of self-propelled particles
• Constraint relaxation leads to jamming
• Boundary layers, transport and universal distribution in boundary driven active systems
• Effective single component description of steady state structures of passive particles in an active bath
• Activity induced delocalization and freezing in self-propelled systems
• A minimal model for structure, dynamics, and tension of monolayered cell colonies
• Curvature controlled defect dynamics in topological active nematics