title: Linear response to perturbation of nonexponential renewal processes.
abstract: We study the linear response of a two-state stochastic process, obeying the renewal condition, by means of a stochastic rate equation equivalent to a master equation with infinite memory. We show that the condition of perennial aging makes the response to coherent perturbation vanish in the long-time limit.
authors.affiliation: Dipartimento di Fisica E. Fermi, Universitá di Pisa, Largo Pontecorvo, 3 56127 Pisa, Italy.
authors.forename: Francesco
authors.initials: F
authors.lastname: Barbi
authors.forename: Mauro
authors.initials: M
authors.lastname: Bologna
authors.forename: Paolo
authors.initials: P
authors.lastname: Grigolini