Fluctuation-dissipation relation for the Ising-Glauber model with arbitrary exchange couplings

2002/12/04 by Christophe Chatelain, Chatelain, Christophe
Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Quantum many-body systems #Theoretical and Computational Physics #cond-mat.stat-mech

paper · pdf · doi:10.48550/arxiv.cond-mat/0212084

8 pages

arxiv created 2002/12/04 · arxiv updated 2009/11/30

Abstract

We derive an exact expression of the response function to an infinitesimal magnetic field for the Ising-Glauber model with arbitrary exchange couplings.nThe result is expressed in terms of thermodynamic averages and does not depend on initial conditions or dimension of space. The comparison with the equilibrium case gives some understanding on the way the fluctuation-dissipation theorem is violated out-of-equilibrium.

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