We introduce a schematic nonlinear 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 and violation of the fluctuation-dissipation theorem.
|Titolo:||Off-equilibrium dynamics in a singular diffusion model|
|Data di pubblicazione:||1999|
|Appare nelle tipologie:||1.1.2 Articolo su rivista con ISSN|