Fluctuation-dissipation ratio in an aging Lennard-Jones glass

被引:110
作者
Barrat, JL [1 ]
Kob, W
机构
[1] Univ Lyon 1, Dept Phys Mat, F-69622 Villeurbanne, France
[2] CNRS, F-69622 Villeurbanne, France
[3] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany
来源
EUROPHYSICS LETTERS | 1999年 / 46卷 / 05期
关键词
D O I
10.1209/epl/i1999-00313-4
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
By using extensive molecular dynamics simulations, we have determined the violation of the fluctuation-dissipation theorem in a Lennard-Jones liquid quenched to low temperatures. For this we have calculated X(C), the ratio between a one-particle time-correlation function C and the associated response function. Our results are best fitted by assuming that X(C) is a discontinuous, piecewise constant function. This is similar to what is found in spin systems with one-step replica symmetry breaking. This strengthens the conjecture of a similarity between the phase space structure of structural glasses and such spin systems.
引用
收藏
页码:637 / 642
页数:6
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