Active dumbbells: dynamics and morphology in the coexisting region

Abstract

With the help of molecular dynamics simulations we study an ensemble of active dumbbells in purely repulsive interaction. We derive the phase diagram in the density-activity plane and we characterise the various phases with liquid, hexatic and solid character. The analysis of the structural and dynamical properties, such as enstrophy, mean square displacement, polarisation, and correlation functions, shows the continuous character of liquid and hexatic phases in the coexisting region when the activity is increased starting from the passive limit.

References in corpus (72)

• Novel type of phase transition in a system of self-driven particles
• Collective motion
• The Mechanics and Statistics of Active Matter
• Spontaneous motion in hierarchically assembled active matter
• Physics of Microswimmers - Single Particle Motion and Collective Behavior
• Dynamical clustering and phase separation in suspensions of self-propelled colloidal particles
• Athermal Phase Separation of Self-Propelled Particles with no Alignment
• Active Brownian Particles. From Individual to Collective Stochastic Dynamics
• Emergence of macroscopic directed motion in populations of motile colloids
• Meso-scale turbulence in living fluids
• Statistical Mechanics of Interacting Run-and-Tumble Bacteria
• Long-lived Giant Number Fluctuations in a Swarming Granular Nematic
• Energy flow, partial equilibration and effective temperatures in systems with slow dynamics
• Dynamic clustering in active colloidal suspensions with chemical signaling
• How far from equilibrium is active matter?
• Two-step melting in two dimensions: First-order liquid-hexatic transition
• Collective Motion of Vibrated Polar Disks
• Phase transition in the collective migration of tissue cells: experiment and model
• Sedimentation of active colloidal suspensions
• Diffusive transport without detailed balance in motile bacteria: Does microbiology need statistical physics?
• Non-equilibrium clustering of self-propelled rods
• Swarming and swirling in self-propelled polar granular rods
• Large-scale collective properties of self-propelled rods
• Physics of adherent cells
• Full phase diagram of active Brownian disks: from melting to motility-induced phase separation
• 2D Melting: From Liquid-Hexatic Coexistence to Continuous Transitions
• Arrested phase separation in reproducing bacteria: a generic route to pattern formation?
• Sedimentation, trapping, and rectification of dilute bacteria
• Flocking at a distance in active granular matter
• A self-propelled particle in an external potential: is there an effective temperature?
• The effective temperature
• Hard-disk equation of state: First-order liquid-hexatic transition in two dimensions with three simulation methods
• Spontaneously ordered motion of self-propelled particles
• Effective Interactions in Active Brownian Suspensions
• Crystallization in a dense suspension of self-propelled particles
• Freezing and phase separation of self-propelled disks
• Effective temperature of active matter
• Event-chain Monte Carlo algorithms for hard-sphere systems
• Generalized Thermodynamics of Phase Equilibria in Scalar Active Matter
• Swarm behavior of self-propelled rods and swimming flagella
• Effective Temperature of Red Blood Cell Membrane Fluctuations
• Long-range Ordering of Vibrated Polar Disks
• Thermodynamic phases in two-dimensional active matter
• Towards a statistical mechanical theory of active fluids
• Glassy dynamics of athermal self-propelled particles: Computer simulations and a nonequilibrium microscopic theory
• Motility-induced phase separation and coarsening in active matter
• Directed transport of active particles over asymmetric energy barriers
• Colloids in a bacterial bath: simulations and experiments
• Observable-dependence of fluctuation-dissipation relations and effective temperatures
• Coupling/decoupling between translational and rotational dynamics in a supercooled molecular liquid
• Activity controls fragility: A Random First Order Transition Theory for an active glass
• Non-conservative forces and effective temperatures in active polymers
• From single-particle to collective effective temperatures in an active fluid of self-propelled particles
• Phase co-existence in bidimensional passive and active dumbbell systems
• Effective temperature and glassy dynamics of active matter
• Evidence for the weak steric hindrance scenario in the supercooled-state reorientational dynamics
• Modeling the dynamics of a tracer particle in an elastic active gel
• Phase behavior of active Brownian disks, spheres, and dumbbells
• Measurement of Effective Temperatures in an Aging Colloidal Glass
• Many-body dynamics of chemically propelled nanomotors
• Dynamics of a homogeneous active dumbbell system
• Microphase separation in two dimensional suspensions of self-propelled spheres and dumbbells
• Fluctuations in glassy systems
• Particle dynamics and effective temperature of jammed granular matter in a slowly sheared 3D Couette cell
• Dynamics in a supercooled liquid of symmetric dumbbells: Reorientational hopping for small molecular elongations
• Glassy swirls of active dumbbells
• Structure and Dynamics of a Phase-Separating Active Colloidal Fluid
• Fluctuations of rotational and translational degrees of freedom in an interacting active dumbbell system
• Effective Temperature in a Colloidal Glass
• Particle-based simulations of self-motile suspensions
• A scenario for the dynamics in the small intropy production limit
• Effective temperature of active fluids and sheared granular matter

Cited by in corpus (27)

• Inertial effects of self-propelled particles: from active Brownian to active Langevin motion
• Motility-induced temperature difference in coexisting phases
• Inertial self-propelled particles
• Lattice Boltzmann Methods and Active Fluids
• Active Ornstein-Uhlenbeck model for self-propelled particles with inertia
• Time-dependent inertia of self-propelled particles: the Langevin rocket
• The Parental Active Model: a unifying stochastic description of self-propulsion
• Effective temperatures in inhomogeneous passive and active bidimensional Brownian particle systems
• Dynamics of active particles with space-dependent swim velocity
• Dynamics of active particles with translational and rotational inertia
• Entropons as collective excitations in active solids
• Activity-controlled clogging and unclogging of micro-channels
• Time-dependent properties of interacting active matter: dynamical behavior of one-dimensional systems of self-propelled particles
• The stability phase diagram of active Brownian particles
• Designing, Synthesizing and Modeling Active Fluids
• Hydrodynamics of polymers in an active bath
• Work fluctuations of self-propelled particles in the phase separated state
• Velocity and Speed Correlations in Hamiltonian Flocks
• Phase behaviour and dynamics of three-dimensional active dumbbell systems
• Frictional Active Brownian Particles
• Stability of interlocked self-propelled dumbbell clusters
• Fluctuation Theorems for Heat exchanges between passive and active baths
• Theory for the Anomalous Phase Behavior of Inertial Active Brownian Particles
• Phases of active matter in two dimensions
• Correlated escape of active particles across a potential barrier
• Transverse Self-Propulsion Enhances the Aggregation of Active Dumbbells
• Morphology, Polarization Patterns, Compression, and Entropy Production in Phase-Separating Active Dumbbell Systems