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.