Fluctuation dissipation ratio in an aging Lennard-Jones glass

Details Fluctuation dissipation ratio in an aging Lennard-Jones glass Fluctuation dissipation ratio in an aging Lennard-Jones glass

1998-06-02

arxiv.org/abs/cond-mat/9806027v2

Europhys. Lett. 46, 637 (1999)

Physics

Condensed Matter

Statistical Mechanics

improved data and method

Scientific paper

10.1209/epl/i1999-00313-4

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.

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