Breakdown of Gallavotti-Cohen symmetry for stochastic dynamics

Abstract

We consider the behaviour of current fluctuations in the one-dimensional partially asymmetric zero-range process with open boundaries. Significantly, we find that the distribution of large current fluctuations does not satisfy the Gallavotti-Cohen symmetry and that such a breakdown can generally occur in systems with unbounded state space. We also discuss the dependence of the asymptotic current distribution on the initial state of the system.

arXiv comment7 pages, 3 figures. v4: minor alterations for consistency with published version to be found at http://www.edpsciences.org/journal/index.cfm?edpsname=epl

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