Equilibrium free energy differences from nonequilibrium measurements: a master equation approach

Details Equilibrium free energy differences from nonequilibrium measurements: a master equation approach Equilibrium free energy differences from nonequilibrium measurements: a master equation approach

1997-07-30

arxiv.org/abs/cond-mat/9707325v1

Phys Rev E 56, 5018 (1997)

Physics

Condensed Matter

Statistical Mechanics

29 pages + 9 figures, to appear in Phys Rev E

Scientific paper

10.1103/PhysRevE.56.5018

It has recently been shown that the Helmholtz free energy difference between two equilibrium configurations of a system may be obtained from an ensemble of finite-time (nonequilibrium) measurements of the work performed in switching an external parameter of the system. Here this result is established, as an identity, within the master equation formalism. Examples are discussed and numerical illustrations provided.

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