title: Fluctuation-dissipation theorem and the linear Glauber model.
abstract: We obtain exact expressions for the two-time autocorrelation and response functions of the -dimensional linear Glauber model. Although this linear model does not obey detailed balance in dimensions d > or = 2, we show that the usual form of the fluctuation-dissipation ratio still holds in the stationary regime. In the transient regime, we show the occurrence of aging, with a special limit of the fluctuation-dissipation ratio, x(infinity) = 1/2, for a quench at the critical point.
authors.affiliation: Instituto de Física, Universidade de São Paulo, Brazil. mhase@if.usp.br
authors.forename: M O
authors.initials: MO
authors.lastname: Hase
authors.forename: S R
authors.initials: SR
authors.lastname: Salinas
authors.forename: T
authors.initials: T
authors.lastname: Tomé
authors.forename: M J
authors.initials: MJ
authors.lastname: de Oliveira