Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2003-05-02
Phys. Rev. B 68, 224429 (2003)
Physics
Condensed Matter
Disordered Systems and Neural Networks
39 pages, 36 figures
Scientific paper
10.1103/PhysRevB.68.224429
We investigate numerically the dynamics of three different spin models in the aging regime. Each of these models is meant to be representative of a distinct class of aging behavior: coarsening systems, discontinuous spin glasses, and continuous spin glasses. In order to study dynamic heterogeneities induced by quenched disorder, we consider single-spin observables for a given disorder realization. In some simple cases we are able to provide analytical predictions for single-spin response and correlation functions. The results strongly depend upon the model considered. It turns out that, by comparing the slow evolution of a few different degrees of freedom, one can distinguish between different dynamic classes. As a conclusion we present the general properties which can be induced from our results, and discuss their relation with thermometric arguments.
Montanari Andrea
Ricci-Tersenghi Federico
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