title: Off-equilibrium effective temperature in monatomic Lennard-Jones glass.
abstract: The off-equilibrium dynamics of a monatomic Lennard-Jones glass is numerically 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 T(eff), where m(T(eff)) = 1. We report T(eff) as a function of the density and compare it with the glass transition temperature T(g) as determined by equilibrium calculations.
authors.affiliation: Universitá di L'Aquila and INFM, I-67100, L'Aquila, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Di Leonardo
authors.forename: L
authors.initials: L
authors.lastname: Angelani
authors.forename: G
authors.initials: G
authors.lastname: Parisi
authors.forename: G
authors.initials: G
authors.lastname: Ruocco