Generalized fluctuation relation and effective temperatures in a driven fluid
统计力学
2009-11-10 v3 无序系统与神经网络
摘要
By numerical simulation of a Lennard-Jones like liquid driven by a velocity gradient \gamma we test the fluctuation relation (FR) below the (numerical) glass transition temperature T_g. We show that, in this region, the FR deserves to be generalized introducing a numerical factor X(T,\gamma)<1 that defines an ``effective temperature'' T_{FR}=T/X. On the same system we also measure the effective temperature T_{eff}, as defined from the generalized fluctuation-dissipation relation, and find a qualitative agreement between the two different nonequilibrium temperatures.
引用
@article{arxiv.cond-mat/0403579,
title = {Generalized fluctuation relation and effective temperatures in a driven fluid},
author = {F. Zamponi and G. Ruocco and L. Angelani},
journal= {arXiv preprint arXiv:cond-mat/0403579},
year = {2009}
}
备注
Version accepted for publication on Phys.Rev.E; major changes, 1 figure added