Communication Dans Un Congrès Année : 2024

Emergence of mesoscale flows under non-equilibrium drive in crowded environments

Résumé

The emergence of surprising collective behaviors in systems driven out of equilibrium by local energy injection at the particle level remains a central theme in the study of active matter. Recently, chaotic flows reminiscent of turbulence have garnered significant attention due to their appearance in diverse biological and physical active matter systems. In this talk, I will demonstrate how even the simplest model of active particles — self-propelled point particles — can exhibit mesoscale flows, characterized by streams and vortices, when very persistent active forces compete with crowding at high densities. In the second part, I will introduce a minimal model of non-reciprocal interactions inspired by human crowds, which generates collective flows strikingly similar to those of the self-propelled particles. Interestingly, as the system approaches the equilibrium limit by reducing non-reciprocity, it undergoes an absorbing phase transition characterized by an infinite number of absorbing states and critical exponents consistent with the conserved directed percolation universality class.

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Dates et versions

hal-04876412 , version 1 (09-01-2025)

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  • HAL Id : hal-04876412 , version 1

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Juliane U. Klamser, Yann-Edwin Keta, Robert L Jack, Ludovic Berthier. Emergence of mesoscale flows under non-equilibrium drive in crowded environments. INDO-FRENCH WORKSHOP ON CLASSICAL AND QUANTUM DYNAMICS IN OUT OF EQUILIBRIUM SYSTEMS, Abhishek Dhar (ICTS-TIFR, India); Manas Kulkarni (ICTS-TIFR, India); Satya N. Majumdar (LPTMS, France); Gautam Mandal (TIFR Mumbai, India); Alberto Rosso (LPTMS, France); Gregory Schehr (LPTHE, France), Dec 2024, Bengaluru (Bangalore), India. ⟨hal-04876412⟩
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