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Fluctuation dissipation relations far from equilibrium

FREE ARTICLE Focus on Dynamics of Non-Equilibrium Systems

Federico Corberi1, Eugenio Lippiello2 and Marco Zannetti1

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Part of Focus on Dynamics of Non-Equilibrium Systems

In this paper we review some recent progress in the field of non-equilibrium linear response theory. We show how a generalization of the fluctuation dissipation theorem can be derived for Markov processes, and discuss the Cugliandolo–Kurchan fluctuation dissipation relation for ageing systems and the theorem by Franz et al relating static and dynamic properties. We than specialize to phase ordering systems, examining the scaling properties of the linear response function and how these are determined by the behaviour of topological defects. We discuss how the connection between statics and dynamics can be violated in these systems at the lower critical dimension or due to stochastic instability.


Keywords

coarsening processes (theory)

PACS

05.40.-a Fluctuation phenomena, random processes, noise, and Brownian motion

02.50.Ga Markov processes

02.50.Cw Probability theory

02.50.Ey Stochastic processes

MSC

82C31 Stochastic methods (Fokker-Planck, Langevin, etc.) (See also 60H10)

60Jxx Markov processes

60Gxx Stochastic processes

Subjects

Computational physics

Statistical physics and nonlinear systems

Dates

Issue 07 (July 2007)

Received 5 March 2007, accepted for publication 28 May 2007

Published 3 July 2007



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