Off-Equilibrium Effective Temperature in Monatomic Lennard-Jones Glass
R. Di Leonardo, L. Angelani, G. Parisi, G. Ruocco
Abstract
The off-equilibrium dynamics of a monatomic Lennard-Jones glass is investigated after sudden isothermal density jumps (crunch) from well equilibrated liquid configurations towards the glassy state. The generalized fluctuation-dissipation relation has been studied and the temperature dependence of the violation factor m is found in agreement with the one step replica symmetry breaking scenario, i.e. at low temperature m(T) is found proportional to T up to an off-equilibrium effective temperature Teff, where m(Teff)=1. We report Teff as a function of the density and compare it with the glass transition temperatures Tg as determined by equilibrium calculations.
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