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Fluctuation dissipation ratio in an aging Lennard-Jones glass | | Jean-Louis Barrat
; Walter Kob
; | | Date: |
2 Jun 1998 | | Journal: | Europhys. Lett. 46, 637 (1999) | | Subject: | Statistical Mechanics; Disordered Systems and Neural Networks | cond-mat.stat-mech cond-mat.dis-nn | | Affiliation: | Departement de Physique des Materiaux, Lyon, France) and Walter Kob (Institute of Physics, Mainz, Germany | | Abstract: | 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 strengthen the conjecture of a similarity between the phase space structure of structural glasses and such spin systems. | | Source: | arXiv, cond-mat/9806027 | | Services: | Forum | Review | PDF | Favorites | |
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