A kinetic-Monte Carlo perspective on active matter
arXiv:1812.06308 · doi:10.1063/1.5085828
Abstract
We study non-equilibrium phases for interacting two-dimensional self-propelled particles with isotropic pair-wise interactions using a persistent kinetic Monte Carlo (MC) approach. We establish the quantitative phase diagram, including the motility-induced phase separation (MIPS) that is a commonly observed collective phenomena in active matter. In addition, we demonstrate for several different potential forms the presence of two-step melting, with an intermediate hexatic phase, in regions far from equilibrium. Increased activity can melt a two-dimensional solid and the melting lines remain disjoint from MIPS. We establish this phase diagram for a range of the inter-particle potential stiffnesses, and identify the MIPS phase even in the hard-disk limit. We establish that the full description of the phase behavior requires three independent control parameters.
arXiv comment11 pages, 10 figures
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- Transmission of mobility via cooperative mechanisms in soft active matter
- Dynamic phase transition induced by active molecules simulating a facilitation mechanism in a supercooled liquid
- Scanning-probe and information-concealing machine learning intermediate hexatic phase and critical scaling of solid-hexatic phase transition in deformable particles
- Constraint relaxation leads to jamming
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- Kinetic Event-Chain Algorithm for Active Matter