6533b7d7fe1ef96bd1267ab7

RESEARCH PRODUCT

Phase Behavior of Active Swimmers in Depletants: Molecular Dynamics and Integral Equation Theory

Peter VirnauBenjamin TrefzSergei A. EgorovSubir K. DasKurt Binder

subject

Current (mathematics)PolymersMovementFOS: Physical sciencesGeneral Physics and AstronomyBinary numberCondensed Matter - Soft Condensed MatterMolecular Dynamics SimulationModels BiologicalDiffusionMolecular dynamicsColloidPhase (matter)ColloidsStatistical physicsCondensed Matter - Statistical MechanicsPhase diagramPhysicsStatistical Mechanics (cond-mat.stat-mech)Active systemsModels TheoreticalIntegral equationCondensed Matter::Soft Condensed MatterKineticsClassical mechanicsModels ChemicalSoft Condensed Matter (cond-mat.soft)

description

We study the structure and phase behavior of a binary mixture where one of the components is self-propelling in nature. The inter-particle interactions in the system were taken from the Asakura-Oosawa model, for colloid-polymer mixtures, for which the phase diagram is known. In the current model version the colloid particles were made active using the Vicsek model for self-propelling particles. The resultant active system was studied by molecular dynamics methods and integral equation theory. Both methods produce results consistent with each other and demonstrate that the Vicsek model based activity facilitates phase separation, thus broadening the coexistence region.

https://doi.org/10.1103/physrevlett.112.198301