Fluctuation theorems: Work is not an observable

Details Fluctuation theorems: Work is not an observable Fluctuation theorems: Work is not an observable

2007-03-07

arxiv.org/abs/cond-mat/0703189v3

Physical Review E 75, 050102(R) (2007)

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1103/PhysRevE.75.050102

The characteristic function of the work performed by an external time-dependent force on a Hamiltonian quantum system is identified with the time-ordered correlation function of the exponentiated system's Hamiltonian. A similar expression is obtained for the averaged exponential work which is related to the free energy difference of equilibrium systems by the Jarzynski work theorem.

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