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 rootepsilon 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.
|Titolo:||Aging and fluctuation-dissipation ratio for the dilute Ising model|
|Autori:||Calabrese P; Gambassi A|
|Data di pubblicazione:||2002|
|Digital Object Identifier (DOI):||10.1103/PhysRevB.66.212407|
|Appare nelle tipologie:||1.1 Journal article|