Ageing in the contact process: Scaling behavior and universal features

Details Ageing in the contact process: Scaling behavior and universal features Ageing in the contact process: Scaling behavior and universal features

2006-10-10

arxiv.org/abs/cond-mat/0610260v1

J.Stat.Mech.0701:P01002,2007

Physics

Condensed Matter

Statistical Mechanics

20 pages, 3 figures

Scientific paper

10.1088/1742-5468/2007/01/P01002

We investigate some aspects of the ageing behavior observed in the contact process after a quench from its active phase to the critical point. In particular we discuss the scaling properties of the two-time response function and we calculate it and its universal ratio to the two-time correlation function up to first order in the field-theoretical epsilon-expansion. The scaling form of the response function does not fit the prediction of the theory of local scale invariance. Our findings are in good qualitative agreement with recent numerical results.

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