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arXiv · cond-mat/0307554

Intermittency of glassy relaxation and the emergence of a non-equilibrium spontaneous measure in the aging regime

A. Crisanti·F Ritort
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Abstract

We consider heat exchange processes between non-equilibrium aging systems (in their activated regime) and the thermal bath in contact. We discuss a scenario where two different heat exchange processes concur in the overall heat dissipation: a stimulated fast process determined by the temperature of the bath and a spontaneous intermittent process determined by the fact that the system has been prepared in a non-equilibrium state. The latter is described by a probability distribution function (PDF) that has an exponential tail of width given by a parameter $λ$, and satisfies a fluctuation theorem (FT) governed by that parameter. The value of $λ$ is proportional to the so-called effective temperature, thereby providing a practical way to experimentally measure it by analyzing the PDF of intermittent events.

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A. Crisanti, F Ritort. 2003-07-23. Intermittency of glassy relaxation and the emergence of a non-equilibrium spontaneous measure in the aging regime. https://doi.org/10.1209/epl%2Fi2003-10158-3

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