Comment on `Detailed balance has a counterpart in non-equilibrium steady states'

Details Comment on `Detailed balance has a counterpart in non-equilibrium steady states' Comment on `Detailed balance has a counterpart in non-equilibrium steady states'

2009-01-30

arxiv.org/abs/0901.4879v2

Physics

Condensed Matter

Statistical Mechanics

3 pages, 3 figures

Scientific paper

Transition rates in continuously driven steady states were derived in [Evans R M L, 2005 J. Phys. A: Math. Gen. 38, 293] by demanding that no information other than the microscopic laws of motion and the macroscopic observables of the system be used to describe it. In addition to the mean energy at equilibrium, and unlike them, these driven states have a finite throughput of flux. This implies that the (nonequilibrium) reservoir, to which the system is weakly coupled, is fully characterised by its mean energy and mean flux. While we expect the resulting prescription for the rates in continuous and discretised time versions of models of real systems to be equivalent, it is not trivial to see this from the expression for the rates derived previously. We demonstrate this equivalence for a model of activated processes solved previously for continuous time, thus demonstrating consistency of theory.

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