Off-equilibrium dynamics in a singular diffusion model

Details Off-equilibrium dynamics in a singular diffusion model Off-equilibrium dynamics in a singular diffusion model

1999-07-06

arxiv.org/abs/cond-mat/9907082v2

Phys. Rev. Lett. 83, 5054 (1999)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.83.5054

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 and violation of the fluctuation dissipation theorem.

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