Activated aging dynamics and negative fluctuation-dissipation ratios

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In glassy materials aging proceeds at large times via thermal activation. We show that this can lead to negative dynamical response functions and novel and well-defined violations of the fluctuation-dissipation theorem, in particular, negative fluctuation-dissipation ratios. Our analysis is based on detailed theoretical and numerical results for the activated aging regime of simple kinetically constrained models. The results are relevant to a variety of physical situations such as aging in glass-formers, thermally activated domain growth and granular compaction.
4 pages, 4 figs; v2 final version (minor modifs) published in Phys. Rev. Lett

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Statistical Mechanics

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http://salesiana.dossiersoluciones.com/handle/123456789/101746

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0508686
 http://arxiv.org/abs/cond-mat/0508686
 Phys. Rev. Lett. 96, 030602 (2006)
 doi:10.1103/PhysRevLett.96.030602

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