Groupe de Physique Statistique

Equipe 106, Institut Jean Lamour

                     
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Articles dans des revues à comité de lecture

Ageing phenomena without detailed balance: The contact process
Enss T., Henkel M., Picone A., Schollwoeck U.
Journal of Physics A: Mathematical and General 37 (2004) 10479
DOI : 10.1088/0305-4470/37/44/002
ArXiv : cond-mat/0406147 [PDF]

The long-time dynamics of the 1D contact process suddenly brought out of an uncorrelated initial state is studied through a light-cone transfer-matrix renormalization group approach. At criticality, the system undergoes ageing which is characterized through the dynamical scaling of the two-times autocorrelation and autoresponse functions. The observed non-equality of the ageing exponents a and b excludes the possibility of a finite fluctuation-dissipation ratio in the ageing regime. The scaling form of the critical autoresponse function is in agreement with the prediction of local scale invariance.



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