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Stealth Entropy Production in Active Field Theories near Ising Critical Points.

Authors :
Caballero F
Cates ME
Source :
Physical review letters [Phys Rev Lett] 2020 Jun 19; Vol. 124 (24), pp. 240604.
Publication Year :
2020

Abstract

We address the steady-state entropy production rate (EPR) of active scalar ϕ^{4} theories, which lack time-reversal symmetry, close to a phase-separation critical point. We consider both nonconserved (model A) and conserved (model B) dynamics at Gaussian level, and also address the former at leading order in ε=4-d. In each case, activity is irrelevant in the RG sense: the active model lies in the same (dynamic Ising) universality class as its time-reversible counterpart. Hence one might expect that activity brings no new critical behavior. Here we show instead that, on approach to criticality in these models, the singular part of the EPR per (diverging) spacetime correlation volume either remains finite or itself diverges. A nontrivial critical scaling for entropy production thus ranks among universal dynamic Ising-class properties.

Details

Language :
English
ISSN :
1079-7114
Volume :
124
Issue :
24
Database :
MEDLINE
Journal :
Physical review letters
Publication Type :
Academic Journal
Accession number :
32639820
Full Text :
https://doi.org/10.1103/PhysRevLett.124.240604