Symmetry-induced fluctuation relations for dynamical observables irrespective of their behavior under time reversal

Physical Review. E
Stefano MarcantoniJuan P Garrahan

Abstract

We extend previous work to describe a class of fluctuation relations (FRs) that emerge as a consequence of symmetries at the level of stochastic trajectories in Markov chains. We prove that given such a symmetry, and for a suitable dynamical observable, it is always possible to obtain a FR under a biased dynamics corresponding to the so-called generalized Doob transform. The general transformations of the dynamics that we consider go beyond time-reversal or spatial isometries, and an implication is the existence of FRs for observables irrespective of their behavior under time reversal, for example for time-symmetric observables rather than currents. We further show how to deduce in the long-time limit these FRs from the symmetry properties of the generator of the dynamics. We illustrate our results with four examples that highlight the novel features of our work.

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Citations

Aug 21, 2021·Physical Review. E·Stefano MarcantoniJuan P Garrahan

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