title: Temperature chaos and quenched heterogeneities.
abstract: We present a treatable generalization of the Sherrington-Kirkpatrick (SK) model which introduces correlations in the elements of the coupling matrix through multiplicative disorder on the single variables and investigate the consequences on the phase diagram. We define a generalized qEA parameter and test the structural stability of the SK results in this correlated case evaluating the de Almeida-Thouless line of the model. As a main result we demonstrate the increase of temperature chaos effects due to heterogeneities.
authors.affiliation: Dipartimento di Fisica, Sapienza Università di Roma, INFN, Sezione di Roma I, IPFC - CNR, P.le Aldo Moro 2, I-00185 Roma, Italy.
authors.forename: Paolo
authors.initials: P
authors.lastname: Barucca
authors.affiliation: Dipartimento di Fisica, Sapienza Università di Roma, INFN, Sezione di Roma I, IPFC - CNR, P.le Aldo Moro 2, I-00185 Roma, Italy.
authors.forename: Giorgio
authors.initials: G
authors.lastname: Parisi
authors.affiliation: Dipartimento di Fisica, Sapienza Università di Roma, INFN, Sezione di Roma I, IPFC - CNR, P.le Aldo Moro 2, I-00185 Roma, Italy.
authors.forename: Tommaso
authors.initials: T
authors.lastname: Rizzo