Aging Effects in a Lennard-Jones Glass

Abstract

Using molecular dynamics simulations we study the out of equilibrium dynamic correlations in a model glass-forming liquid. The system is quenched from a high temperature to a temperature below its glass transition temperature and the decay of the two-time intermediate scattering function $C\left(t_w{,t+t}_w\right)$ is monitored for several values of the waiting time $t_w$ after the quench. We find that $C\left(t_w{,t+t}_w\right)$ shows a strong dependence on the waiting time, i.e., aging, depends on the temperature before the quench, and, similar to the case of spin glasses, can be scaled onto a master curve.