  We investigate a binary Lennard-Jones mixture with molecular dynamics
simulations. We consider first a system cooled linearly in time with the
cooling rate gamma. By varying gamma over almost four decades we study the
influence of the cooling rate on the glass transition and on the resulting
glass. We find for all investigated quantities a cooling rate dependence; with
decreasing cooling rate the system falls out of equilibrium at decreasing
temperatures, reaches lower enthalpies and obtains increasing local order. Next
we study the dynamics of the melting process by investigating the most immobile
and most mobile particles in the glass. We find that their spatial distribution
is heterogeneous and that the immobile/mobile particles are surrounded by
denser/less dense cages than an average particle.
