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Activated aging dynamics and negative fluctuation-dissipation ratios | Peter Mayer
; Sébastien Léonard
; Ludovic Berthier
; Juan P. Garrahan
; Peter Sollich
; | Date: |
29 Aug 2005 | Subject: | Statistical Mechanics | cond-mat.stat-mech | Abstract: | 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. | Source: | arXiv, cond-mat/0508686 | Services: | Forum | Review | PDF | Favorites |
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