Activated aging dynamics and negative fluctuation-dissipation ratios
统计力学
2007-05-23 v2
摘要
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.
引用
@article{arxiv.cond-mat/0508686,
title = {Activated aging dynamics and negative fluctuation-dissipation ratios},
author = {Peter Mayer and Sébastien Léonard and Ludovic Berthier and Juan P. Garrahan and Peter Sollich},
journal= {arXiv preprint arXiv:cond-mat/0508686},
year = {2007}
}
备注
4 pages, 4 figs; v2 final version (minor modifs) published in Phys. Rev. Lett