Stochastic thermodynamics under coarse-graining

Details Stochastic thermodynamics under coarse-graining Stochastic thermodynamics under coarse-graining

2011-12-22

arxiv.org/abs/1112.5410v1

Phys. Rev. E 85, 041125 (2012)

Physics

Condensed Matter

Statistical Mechanics

12 pages, 3 figures

Scientific paper

A general formulation of stochastic thermodynamics is presented for open systems exchanging energy and particles with multiple reservoirs. By introducing a partition in terms of "macrostates" (e.g. sets of "microstates"), the consequence on the thermodynamic description of the system is studied in detail. When microstates within macrostates rapidly thermalize, the entire structure of the microscopic theory is recovered at the macrostate level. This is not the case when these microstates remain out of equilibrium leading to additional contributions to the entropy balance. Some of our results are illustrated for a model of two coupled quantum dots.

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