Off-Equilibrium Dynamics in a Singular Diffusion Model

Federico Corberi, Mario Nicodemi, Marina Piccioni, Antonio Coniglio
1999 Physical Review Letters  
We introduce a schematic non-linear diffusion model where density fluctuations induce a rich out of equilibrium dynamics. The properties of the model are studied by numerical simulations and analytically in a mean field approximation. At low temperatures and high densities we find a long off-equilibrium glassy region, where the system evolves out of an initially pinned state showing aging and a slow decay of the autocorrelation as an enhanced power law, along with strong spatial heterogeneities
more » ... and violation of the fluctuation dissipation theorem.
doi:10.1103/physrevlett.83.5054 fatcat:uo7vhm2bvjbz5ji4uzpjol3txu