Volume 82, Number 5, June 2008
|Number of page(s)||4|
|Published online||22 May 2008|
The “footprints” of irreversibility
Facultat de Fisica, Universitat de Barcelona - Diagonal 647, Barcelona, Spain, EU
2 Departamento de Física Atómica, Molecular y Nuclear and , Universidad Complutense 28040 Madrid, Spain, EU
3 Hasselt University - B-3590 Diepenbeek, Belgium, EU
Accepted: 8 April 2008
We reformulate the result for the entropy production given in Phys. Rev. Lett., 98 (2007) 080602 in terms of the relative entropy of microscopic trajectories. By a combination with the Crook's theorem, we identify the path variables that are sufficient to fully identify irreversibility. We show that work saturates the relative entropy, and derive the entropy production for stochastic descriptions.
PACS: 05.70.Ln – Nonequilibrium and irreversible thermodynamics / 05.20.-y – Classical statistical mechanics / 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion
© EPLA, 2008
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