Generalization of the detailed fluctuation theorem for Non-Hamiltonian Dynamics

Details Generalization of the detailed fluctuation theorem for Non-Hamiltonian Dynamics Generalization of the detailed fluctuation theorem for Non-Hamiltonian Dynamics

2010-07-19

arxiv.org/abs/1007.3071v1

Physics

Condensed Matter

Statistical Mechanics

27 pages, no figures

Scientific paper

Detailed fluctuation theorem, a microscopic version of the steady state fluctuation theorem, has been proposed by Jarzynski and demonstrated in the case of Hamiltonian systems weakly coupled with reservoirs. We show that an identical theorem for phase space compressibility rate can be derived for systems evolving under non-Hamiltonian extended system dynamics, without certain limiting assumptions made in the original work. Our derivation is based on the non-Hamiltonian phase space formulation of statistical mechanics and does not rely on any assumptions of thermodynamic nature. This version of the detailed fluctuation theorem is shown to be generic enough to be applicable to several thermostatting schemes. It is shown that in equilibrium, this detailed fluctuation theorem boils down to the detailed balance equation and it is further shown to reproduce the Jarzynski's work theorem for driven systems.

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