Fluctuation-Dissipation Theorem for Metastable Systems

Details Fluctuation-Dissipation Theorem for Metastable Systems Fluctuation-Dissipation Theorem for Metastable Systems

2003-03-14

arxiv.org/abs/cond-mat/0303281v1

Phys. Rev. Lett. 90, 135701 (2003).

Physics

Condensed Matter

Statistical Mechanics

Revtex, 4 pages, 1 figure, to appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.90.135701

We show that an appropriately defined fluctuation-dissipation theorem, connecting generalized susceptibilities and time correlation functions, is valid for times shorter than the nucleation time of the metastable state of Markovian systems satisfying detailed balance. This is done by assuming that such systems can be described by a superposition of the ground and first excited states of the master equation. We corroborate our results numerically for the metastable states of a two-dimensional Ising model.

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