Entropy production as correlation between system and reservoir

  title={Entropy production as correlation between system and reservoir},
  author={Massimiliano Esposito and Katja Lindenberg and Christian Van den Broeck},
  journal={New Journal of Physics},
We derive an exact (classical and quantum) expression for the entropy production of a finite system placed in contact with one or several finite reservoirs, each of which is initially described by a canonical equilibrium distribution. Although the total entropy of system plus reservoirs is conserved, we show that system entropy production is always positive and is a direct measure of system–reservoir correlations and/or entanglements. Using an exactly solvable quantum model, we illustrate our… 

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