Phase Behavior and Dynamics of Active Brownian Particles in an Alignment Field
arXiv:2403.02947 · doi:10.1103/PhysRevE.111.015425
Abstract
Self-propelled particles that are subject to noise are a well-established generic model system for active matter. A homogeneous alignment field can be used to orient the direction of the self-propulsion velocity and to model systems like phoretic Janus particles with a magnetic dipole moment or magnetotactic bacteria in an external magnetic field. Computer simulations are used to predict the phase behavior and dynamics of self-propelled Brownian particles in a homogeneous alignment field in two dimensions. Phase boundaries of the gas-liquid coexistence region are calculated for various Péclet numbers, particle densities, and alignment field strengths. Critical points and exponents are calculated and, in agreement with previous simulations, do not seem to belong to the universality class of the 2D Ising model. Finally, the dynamics of spinodal decomposition for quenching the system from the one-phase to the two-phase coexistence region by increasing Péclet number is characterized. Our results may help to identify parameters for optimal transport of active matter in complex environments.
arXiv comment8 pages, 8 figures
References in corpus (24)
- Novel type of phase transition in a system of self-driven particles
- Active Particles in Complex and Crowded Environments
- Physics of Microswimmers - Single Particle Motion and Collective Behavior
- Collective Motion of Vibrated Polar Disks
- Microswimmers in Patterned Environments
- Non-equilibrium clustering of self-propelled rods
- A continuum theory of phase separation kinetics for active Brownian particles
- Generalized Centrifugal Force Model for Pedestrian Dynamics
- Self-propelled Janus particles in a ratchet: Numerical simulations
- Sculpting vesicles with active particles: Less is more
- Cooperative Motion of Active Brownian Spheres in Three-Dimensional Dense Suspensions
- Generalized Thermodynamics of Phase Equilibria in Scalar Active Matter
- Large-scales patterns in a minimal cognitive flocking model: incidental leaders, nematic patterns, and aggregates
- Collective behavior of penetrable self-propelled rods in two dimensions
- Critical behavior of active Brownian particles
- Swarming, swirling and stasis in sequestered bristle-bots
- Non-negative Interfacial Tension in Phase-Separated Active Brownian Particles
- Collective behavior of self-steering active particles with velocity alignment and visual perception
- Coexistence of active Brownian discs: Van der Waals theory and analytical results
- Phase behavior of flexible and semiflexible polymers in solvents of varying quality
- Dimensionality Dependence of Aging in Kinetics of Diffusive Phase Separation: Behavior of order-parameter autocorrelation
- Flocking and reorientation transition in the 4-state active Potts model
- Controlling stability and transport of magnetic microswimmers by an external field
- Emergent pattern formation of active magnetic suspensions in an external field