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arXiv · 2212.03324

Tricritical behavior in dynamical phase transitions

Tal Agranov·Michael E. Cates·Robert L. Jack
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Abstract

We identify a new scenario for dynamical phase transitions associated with time-integrated observables occurring in diffusive systems described by the macroscopic fluctuation theory. It is characterized by the pairwise meeting of first- and second-order bias-induced phase transition curves at two tricritical points. We formulate a simple, general criterion for its appearance and derive an exact Landau theory for the tricritical behavior. The scenario is demonstrated in three examples: the simple symmetric exclusion process biased by an activity-related structural observable; the Katz-Lebowitz-Spohn lattice gas model biased by its current; and in an active lattice gas biased by its entropy production.

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Tal Agranov, Michael E. Cates, Robert L. Jack. 2022-12-06. Tricritical behavior in dynamical phase transitions. https://doi.org/10.1103/physrevlett.131.017102

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