Off-equilibrium effective temperature in monatomic Lennard-Jones glass.
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.
Di Leonardo
R
R
Universitá di L'Aquila and INFM, I-67100, L'Aquila, Italy.
Angelani
L
L
Parisi
G
G
Ruocco
G
G