Aging in Models of Non-linear Diffusion

Details Aging in Models of Non-linear Diffusion Aging in Models of Non-linear Diffusion

1996-12-09

arxiv.org/abs/cond-mat/9612082v1

Physics

Condensed Matter

4 pages, 1 figure, to appear in Phys.Rev.E

Scientific paper

10.1103/PhysRevE.55.4806

We show that for a family of problems described by non-linear diffusion equations an exact calculation of the two time correlation function gives C(t,t')=f(t-t')g(t'), t>t', exhibiting normal and anomalous diffusions, as well as aging effects, depending on the degree of non-linearity. We discuss also the form in which FDT is violated in this class of systems. Finally we argue that in this type of models aging may be consequence of the non conservation of the "total mass".

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