Response function of coarsening systems

L. Berthier (), J. Barrat and J. Kurchan

The European Physical Journal B: Condensed Matter and Complex Systems, 1999, vol. 11, issue 4, 635-641

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. Copyright Società Italiana di Fisica, Springer-Verlag 1999

Keywords: PACS. 05.70.Ln Nonequilibrium and irreversible thermodynamics; 75.40.Gb Gb Dynamic properties (dynamic susceptibility; spin waves; spin diffusion; dynamic scaling; etc.); 75.40.Mg Numerical simulation studies (search for similar items in EconPapers)
Date: 1999
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DOI: 10.1007/s100510051192

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