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.
Off-equilibrium dynamics in a singular diffusion model
CORBERI, Federico;
1999-01-01
Abstract
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.File in questo prodotto:
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