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Anomalous Behavior of the Contact Process with Aging

S. N. Dorogovtsev, J. F. F. Mendes

cond-mat.stat-mecharXiv:cond-mat/0007324

Abstract

The effect of power-law aging on a contact process is studied by simulation and using a mean-field approach. We find that the system may approach its stationary state in a nontrivial, nonmonotonous way. For the particular value of the aging exponent, α=1, we observe a rich set of behaviors: depending on the process parameters, the relaxation to the stationary state proceeds as 1/ t or via a power law with a nonuniversal exponent. Simulation results suggest that for 0<α<1, the absorbing-state phase transition is in the universality class of directed percolation.

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