Groupe de Physique Statistique

Equipe 106, Institut Jean Lamour

                     
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Articles dans des revues à comité de lecture

Ageing in the contact process: Scaling behavior and universal features
Baumann F. and Gambassi A.
J. Stat. Mech. (2007) P01002
DOI : 10.1088/1742-5468/2007/01/P01002
ArXiv : cond-mat/0610260 [PDF]

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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