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Intermittency of glassy relaxation and the emergence of a non-equilibrium spontaneous measure in the aging regime | | A. Crisanti
; F Ritort
; | | Date: |
23 Jul 2003 | | Subject: | Soft Condensed Matter; Disordered Systems and Neural Networks | cond-mat.soft cond-mat.dis-nn | | 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 $lambda$, and satisfies a fluctuation theorem (FT) governed by that parameter. The value of $lambda$ is proportional to the so-called effective temperature, thereby providing a practical way to experimentally measure it by analyzing the PDF of intermittent events. | | Source: | arXiv, cond-mat/0307554 | | Services: | Forum | Review | PDF | Favorites | |
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