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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Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Argentina
Inst Balseiro, RA-8400 San Carlos De Bariloche, ArgentinaCtr Atom Bariloche, RA-8400 San Carlos De Bariloche, Argentina
Garcia-Garcia, Reinaldo
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Lecomte, Vivien
Kolton, Alejandro B.
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Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Argentina
Inst Balseiro, RA-8400 San Carlos De Bariloche, ArgentinaCtr Atom Bariloche, RA-8400 San Carlos De Bariloche, Argentina
Kolton, Alejandro B.
Dominguez, Daniel
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Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Argentina
Inst Balseiro, RA-8400 San Carlos De Bariloche, ArgentinaCtr Atom Bariloche, RA-8400 San Carlos De Bariloche, Argentina
Dominguez, Daniel
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT,
2012,