Fluctuation theorems for stochastic dynamics

Details Fluctuation theorems for stochastic dynamics Fluctuation theorems for stochastic dynamics

2007-02-23

arxiv.org/abs/cond-mat/0702553v2

J. Stat. Mech. (2007) P07020

Physics

Condensed Matter

Statistical Mechanics

48 pages, 2 figures. v2: minor changes for consistency with published version

Scientific paper

10.1088/1742-5468/2007/07/P07020

Fluctuation theorems make use of time reversal to make predictions about entropy production in many-body systems far from thermal equilibrium. Here we review the wide variety of distinct, but interconnected, relations that have been derived and investigated theoretically and experimentally. Significantly, we demonstrate, in the context of Markovian stochastic dynamics, how these different fluctuation theorems arise from a simple fundamental time-reversal symmetry of a certain class of observables. Appealing to the notion of Gibbs entropy allows for a microscopic definition of entropy production in terms of these observables. We work with the master equation approach, which leads to a mathematically straightforward proof and provides direct insight into the probabilistic meaning of the quantities involved. Finally, we point to some experiments that elucidate the practical significance of fluctuation relations.

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