Study of a microcanonical algorithm on the +/- J spin glass model in d=3

We consider a microcanonical local algorithm to be applied on the +/-J spin glass model. We have compared the results coming from a microcanonical Mon te Carlo simulation with those from a canonical one: Thermalization times, spin glass susceptibilities and Binder parameters. For a fixed lattice size we found different results between the two thermodynamic ensembles, which tend to vanish at bigger volumes. Moreover, microcanonical thermalization t imes are longer than the canonical ones. Finally we have checked that one o f the Guerra relations is satisfied with good precision for the two largest lattices. (C) 2000 Elsevier Science B.V. All rights reserved.