2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/24124The long-time dynamics of the 1D contact process suddenly brought out of an uncorrelated initial state is studied through a light-cone transfer-matrix renormalisation group approach. At criticality, the system undergoes ageing which is characterised 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.20 pages, 15 figures, Latex2e with IOP macrosStatistical MechanicsSoft Condensed MatterMathematical Physicstext