%0 Journal Article %T Disordered collective motion in dense assemblies of persistent particles %+ Laboratoire Charles Coulomb (L2C) %A Keta, Yann-Edwin %A Jack, Robert L. %A Berthier, Ludovic %< avec comité de lecture %Z L2C:22-098 %@ 0031-9007 %J Physical Review Letters %I American Physical Society %P 048002 %8 2022-09-13 %D 2022 %Z 2201.04902 %R 10.1103/PhysRevLett.129.048002 %Z Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft] %Z Physics [physics]/Condensed Matter [cond-mat]/Statistical Mechanics [cond-mat.stat-mech]Journal articles %X 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 %G English %L hal-03775859 %U https://hal.science/hal-03775859 %~ CNRS %~ L2C %~ UNIV-MONTPELLIER %~ UM-2015-2021 %~ UM-EPE