Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2010-03-04
Phil. Trans. R. Soc. A 369 (2011) 291-306
Physics
Condensed Matter
Statistical Mechanics
16 pages
Scientific paper
10.1098/rsta.2010.0252
The quantum version of the Bochkov-Kuzovlev identity is derived on the basis of the appropriate definition of work as the difference of the measured internal energies of a quantum system at the beginning and at the end of an external action on the system given by a prescribed protocol. According to the spirit of the original Bochkov-Kuzovlev approach, we adopt the "exclusive" viewpoint, meaning that the coupling to the external work-source is {\it not} counted as part of the internal energy. The corresponding canonical and microcanonical quantum fluctuation theorems are derived as well, and are compared to the respective theorems obtained within the "inclusive" approach. The relations between the quantum inclusive-work $w$, the exclusive-work $w_0$ and the dissipated-work $w_{dis}$, are discussed and clarified. We show by an explicit example that $w_0$ and $w_{dis}$ are distinct stochastic quantities obeying different statistics.
Campisi Michele
Hänggi Peter
Talkner Peter
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