Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session M03: Physics of Social Interactions I
8:00 AM–10:48 AM,
Wednesday, March 16, 2022
Room: McCormick Place W-176A
Sponsoring
Unit:
DBIO
Chair: Orit Peleg, University of Colorado Boulder
Abstract: M03.00008 : Signatures of irreversibility in microscopic models of flocking
9:48 AM–10:00 AM
Presenter:
Federica Ferretti
(Univ of Rome La Sapienza)
Authors:
Federica Ferretti
(Univ of Rome La Sapienza)
Caroline Holmes
(Princeton University)
Jordan L Shivers
(Rice University)
Simon B Grosse-Holz
(Massachusetts Institute of Technology MI)
Irene Giardina
(Univ of Rome La Sapienza)
Aleksandra M Walczak
(CNRS - Sorbonne University)
Thierry Mora
(Ecole Normale Superieure)
We investigate how the interplay of alignment interaction and self-propulsion in Vicsek-like dynamics leads to the breakdown of detailed balance and constrains asymmetries in the steady-state distribution of the many-body system. We quantify the departure from equilibrium through measurements of the entropy production rate on numerical simulations of polar ABPs, considering two variants of the model, with metric and topological interaction rules. It is known that they give rise to different kinds of phase transitions and macroscopic configurations, and we find that different signatures of irreversibility can be identified in the two cases.
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