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Monte-Carlo simulations of the violation of the fluctuation-dissipation theorem in domain growth processes

A. Barrat
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Abstract

Numerical simulations of various domain growth systems are reported, in order to compute the parameter describing the violation of fluctuation dissipation theorem (FDT) in aging phenomena. We compute two-times correlation and response functions and find that, as expected from the exact solution of a certain mean-field model (equivalent to the O(N) model in three dimensions, in the limit of N going to infinity), this parameter is equal to one (no violation of FDT) in the quasi-equilibrium regime (short separation of times), and zero in the aging regime.

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A. Barrat. 1997-10-08. Monte-Carlo simulations of the violation of the fluctuation-dissipation theorem in domain growth processes. https://doi.org/10.1103/physreve.57.3629

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