Aging and fluctuation-dissipation ratio for the dilute Ising model

Pasquale Calabrese, Andrea Gambassi
2002 Physical Review B (Condensed Matter)  
We consider the out-of-equilibrium, purely relaxational dynamics of a weakly diluted Ising model in the aging regime at criticality. We derive at first order in a √(ϵ) expansion the two-time response and correlation functions for vanishing momenta. The long-time limit of the critical fluctuation-dissipation ratio is computed at the same order in perturbation theory.
doi:10.1103/physrevb.66.212407 fatcat:blagowtokjaczb4zxst23lan7i