Fluctuation theorem for the renormalized entropy change in the strongly nonlinear nonequilibrium regime

Details Fluctuation theorem for the renormalized entropy change in the strongly nonlinear nonequilibrium regime Fluctuation theorem for the renormalized entropy change in the strongly nonlinear nonequilibrium regime

2008-03-10

arxiv.org/abs/0803.1429v2

Physics

Condensed Matter

Statistical Mechanics

14 pages, no figures. Typos corrected

Scientific paper

10.1103/PhysRevE.78.021101

Generalizing a recent work [T. Taniguchi and E. G. D. Cohen, J. Stat. Phys. 126, 1 (2006)] that was based on the Onsager-Machlup theory, a nonlinear relaxation process is considered for a macroscopic thermodynamic quantity. It is found that the fluctuation theorem holds in the nonlinear nonequilibrium regime if the change of the entropy characterized by local equilibria is appropriately renormalized. The fluctuation theorem for the ordinary entropy change is recovered in the linear near-equilibrium case. This result suggests a possibility that the the information-theoretic entropy of the Shannon form may be modified in the strongly nonlinear nonequilibrium regime.

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