Effective single component description of steady state structures of passive particles in an active bath

Abstract

We model a binary mixture of passive and active Brownian particles in two dimensions using the effective interaction between passive particles in the active bath. The activity of active particles and the size ratio of two types of particles are two control parameters in the system. The effective interaction is calculated from the average force on two particles generated by the active particles. The effective interaction can be attractive or repulsive, depending on the system parameters. The passive particles form four distinct structural orders for different system parameters viz; disorder (D), disordered cluster (DC), ordered cluster (OC), and poly-crystalline order (P C). The change in structure is dictated by the change in nature of the effective interaction. We further confirm the four structures using full microscopic simulation of active and passive mixture. Our study is useful to understand the different collective behaviour in non-equilibrium systems.

arXiv comment8-pages and 6-figures

References in corpus (39)

• Novel type of phase transition in a system of self-driven particles
• Simulating Dynamical Features of Escape Panic
• Active Particles in Complex and Crowded Environments
• 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
• Accurate determination of crystal structures based on averaged local bond order parameters
• Onset of collective and cohesive motion
• Long-lived Giant Number Fluctuations in a Swarming Granular Nematic
• Collective motion of self-propelled particles interacting without cohesion
• Pressure is not a state function for generic active fluids
• Freezing by Heating in a Driven Mesoscopic System
• Scalar ${\varphi }^4$ field theory for active-particle phase separation
• Collective motion and nonequilibrium cluster formation in colonies of gliding bacteria
• Activity-induced phase separation and self-assembly in mixtures of active and passive particles
• Self-Starting Micromotors in a Bacterial Bath
• Enhanced diffusion and ordering of self-propelled rods
• Spontaneous velocity alignment in Motility-induced Phase Separation
• Tunable long range forces mediated by self-propelled colloidal hard spheres
• Pattern Formation and Functionality in Swarm Models
• Casimir Effect in Active Matter Systems
• Phase separation in binary mixtures of active and passive particles
• Swim pressure on walls with curves and corners
• Generic long-range interactions between passive bodies in an active fluid
• Velocity alignment promotes motility-induced phase separation
• Effects of active fluctuations on energetics of a colloidal particle: superdiffusion, dissipation and entropy production
• Entropy production and work fluctuation relations for a single particle in active bath
• Active Brownian particles near straight or curved walls: Pressure and boundary layers
• Effect of polydispersity on the dynamics of active Brownian particles
• Phase segregation of passive advective particles in an active medium
• Effective interactions between inclusions in an active bath
• Enhanced dynamics of active Brownian particles in periodic obstacle arrays and corrugated channels
• Depletion forces on circular and elliptical obstacles induced by active matter
• Ordering Kinetics in the Active Model B
• Speed inhomogeneity accelerates the information transfer in polar flock
• Phase separation dynamics of polydisperse colloids: a mean-field lattice-gas theory
• Bond disorder enhances the information transfer in polar flock
• Polar flock with bond disorder