Europhys. Lett., 60 (2) , pp. 316-322 (2002)
Temperature chaos in a replica-symmetry-broken spin glass model -A hierarchical model with temperature chaosM. Sasaki1 and O. C. Martin1, 2
1 Laboratoire de Physique Théorique et Modèles Statistiques, Bât. 100 Université Paris-Sud - F-91405 Orsay, France
2 Service de Physique de l'État Condensé, Orme des Merisiers-CEA Saclay 91191 Gif-sur-Yvette Cedex, France
(Received 20 June 2002; accepted in final form 1 August 2002)
Temperature chaos is an extreme sensitivity of the equilibrium state to a change of temperature. It arises in several disordered systems that are described by the so-called scaling theory of spin glasses, while it seems to be absent in mean-field models. We consider a model spin glass on a tree and show that although it has mean-field behavior with replica symmetry breaking, it manifestly has "strong" temperature chaos. We also show why chaos appears only very slowly with system size.
75.10.Nr - Spin-glass and other random models.
© EDP Sciences 2002