- 03-440 W.De Roeck, C.Maes
- A quantum version of free energy - irreversible work relations
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Sep 23, 03
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Abstract. We give a
quantum version of the Jarzynski relation between the distribution
of work done over a certain time-interval on a system and the
difference of equilibrium free energies. The main new ingredient
is the identification of work depending on the quantum history of
the system and the proper definition of various quantum ensembles
over which the averages should be made. We also discuss a number
of different regimes that have been considered by other authors
and which are unified in the present set-up. In all cases, and
quantum or classical, it is a general relation between heat and
time-reversal that makes the Jarzynski relation so universally
valid.
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