Jamming and flocking in the restricted active Potts model

Abstract

We study the active Potts model with either site occupancy restriction or on-site repulsion to explore jamming and kinetic arrest in a flocking model. The incorporation of such volume exclusion features leads to a surprisingly rich variety of self-organized spatial patterns. While bands and lanes of moving particles commonly occur without or under weak volume exclusion, strong volume exclusion along with low temperature, high activity, and large particle density facilitates jams due to motility-induced phase separation. Through several phase diagrams, we identify the phase boundaries separating the jammed and free-flowing phases and study the transition between these phases which provide us with both qualitative and quantitative predictions of how jamming might be delayed or dissolved. We further formulate and analyze a hydrodynamic theory for the restricted APM which predicts various features of the microscopic model.

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Cited by in corpus (7)

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• Ordering kinetics in the active Ising model
• Three-state active lattice gas: a discrete Vicseklike model with excluded volume
• Stochastic Thermodynamics of Non-reciprocally Interacting Particles and Fields
• Stability of discrete-symmetry flocks: sandwich state, traveling domains and motility-induced pinning
• Field-controlled interfacial transport and pinning in an active spin system