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Journal Articles SciPost Physics Year : 2020

Landau theory for non-equilibrium steady states


We examine how non-equilibrium steady states close to a continuous phase transition can still be described by a Landau potential if one forgoes the assumption of analyticity. In a system simultaneously coupled to several baths at different temperatures, the non-analytic potential arises from the different density of states of the baths. In periodically driven-dissipative systems, the role of multiple baths is played by a single bath transferring energy at different harmonics of the driving frequency. The mean-field critical exponents become dependent on the low-energy features of the two most singular baths. We propose an extension beyond mean field.
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hal-02618184 , version 1 (25-05-2020)



Camille Aron, Claudio Chamon. Landau theory for non-equilibrium steady states. SciPost Physics, 2020, 8 (5), ⟨10.21468/SciPostPhys.8.5.074⟩. ⟨hal-02618184⟩
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