American Physical Society, Physical Review Letters, 24(83), p. 5054-5057, 1999
DOI: 10.1103/physrevlett.83.5054
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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. ; Comment: 4 pages, 2 figures