Generalized Onsager-Machlup's theory of thermal fluctuations for non-equilibrium systems

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Medina-Noyola, M.
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In this work a generalization of Onsager-Machlup's theory of time-dependent thermal fluctuations of equilibrium systems is proposed, to the case in which the system relaxes irreversibly along a non-equilibrium trajectory that can be approximated as a sequence of stationary states. This generalization is summarized by a canonical description of the dependence of the two-time correlation function C(t+\tau,t), and of the equal-time correlation function \sigma(t)= C(t,t) (the covariance of the fluctuations), on the non-equilibrium relaxation time t.
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Condensed Matter - Statistical Mechanics, Condensed Matter - Soft Condensed Matter
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