Aging dynamics of heterogeneous spin models

Article

关键词: OFF-EQUILIBRIUM DYNAMICS;    GLASS-TRANSITION;    EFFECTIVE TEMPERATURES;    SUPERCOOLED LIQUIDS;    METASTABLE STATES;    ZERO-TEMPERATURE;    ORDERED PHASE;    SYSTEMS;    RANGE;    RELAXATION;   

DOI  :  10.1103/PhysRevB.68.224429

来源: SCIE

【 摘 要 】

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 heterogeneities of the dynamics 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.

【 授权许可】

Free