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Entropy production and its large deviations in an active lattice gas

Published version
Peer-reviewed

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Authors

Agranov, Tal 
Cates, Michael E 
Jack, Robert L 

Abstract

jats:titleAbstract</jats:title> jats:pActive systems are characterized by a continuous production of entropy at steady state. We study the statistics of entropy production within a lattice-based model of interacting active particles that is capable of motility-induced phase separation. Exploiting a recent formulation of the exact fluctuating hydrodynamics for this model, we provide analytical results for its entropy production statistics in both typical and atypical (biased) regimes. This complements previous studies of the large deviation statistics of entropy production in off-lattice active particle models that could only be addressed numerically. Our analysis uncovers an unexpectedly intricate phase diagram, with five different phases arising (under bias) within the parameter regime where the unbiased system is in its homogeneous state. Notably, we find the concurrence of first order and second order nonequilibrium phase transition curves at a bias-induced tricritical point, a feature not yet reported in previous studies of active systems.</jats:p>

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Keywords

Paper, PAPER: Classical statistical mechanics, equilibrium and non-equilibrium, active matter, fluctuating hydrodynamic, large deviations in non-equilibrium systems, macroscopic fluctation theory

Journal Title

Journal of Statistical Mechanics: Theory and Experiment

Conference Name

Journal ISSN

1742-5468
1742-5468

Volume Title

Publisher

IOP Publishing