Abstract
The response function of domain growth processes, and in particular the violation of the fluctuation-dissipation theorem, are studied both analytically and numerically. In the asymptotic limit of large times, the fluctuation-dissipation ratio X, which quantifies this violation, tends to one if C > m 2 and to zero if C < m 2, corresponding to the fast (“bulk”) and slow (“domain-wall”) responses, respectively. In this paper, we focus on the pre-asymptotic behavior of the domain-wall response. This response is shown to scale with the typical domain length L(t) as 1/L(t) for dimension d > 2, and as ln(L(t))/L(t) for d = 2. Numerical results confirming this analysis are presented.
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Berthier, L., Barrat, J.L. & Kurchan, J. Response function of coarsening systems. Eur. Phys. J. B 11, 635–641 (1999). https://doi.org/10.1007/s100510051192
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DOI: https://doi.org/10.1007/s100510051192