Article Dans Une Revue Physical Review Letters Année : 2022

Disordered collective motion in dense assemblies of persistent particles

Résumé

We explore the emergence of nonequilibrium collective motion in disordered non-thermal active matter when persistent motion and crowding effects compete, using simulations of a two-dimensional model of size polydisperse self-propelled particles. In stark contrast with monodisperse systems, we find that polydispersity stabilizes a homogeneous active liquid at arbitrary large persistence times, characterized by remarkable velocity correlations and irregular turbulent flows. For all persistence values, the active fluid undergoes a nonequilibrium glass transition at large density. This is accompanied by collective motion, whose nature evolves from near-equilibrium spatially heterogeneous dynamics at small persistence, to a qualitatively different intermittent dynamics when persistence is large. This latter regime involves a complex time evolution of the correlated displacement field

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hal-03775859 , version 1 (08-10-2024)

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Yann-Edwin Keta, Robert L. Jack, Ludovic Berthier. Disordered collective motion in dense assemblies of persistent particles. Physical Review Letters, 2022, 129 (4), pp.048002. ⟨10.1103/PhysRevLett.129.048002⟩. ⟨hal-03775859⟩
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