Backbone structure of the Edwards-Anderson spin-glass model

• Autores: Romá, Federico José; Risau-Gusman, S.
• Año de publicación: 2013
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: SPIN-GLASSES; SIMULATION; GROUND-STATE
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

We study the ground-state spatial heterogeneities of the Edwards-Anderson spin-glass model with both bimodal and Gaussian bond distributions. We characterize these heterogeneities by using a general definition of bond rigidity, which allows us to classify the bonds of the system into two sets, the backbone and its complement, with very different properties. This generalizes to continuous distributions of bonds the well-known definition of a backbone for discrete bond distributions. By extensive numerical simulations we find that the topological
structure of the backbone for a given lattice dimensionality is very similar for both discrete and continuous bond distributions. We then analyze how these heterogeneities influence the equilibrium properties at finite temperature and we discuss the possibility that a suitable backbone picture can be relevant to describe spin-glass phenomena.

Fil: Romá, Federico José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET - San Luis. Instituto de Física Aplicada; Argetnina;
Fil: Risau-Gusman, S.. Comisión Nacional de Energía Atomica. Gerencia del Área de Investigaciones y Aplicaciones No Nucleares. Gerencia de Física (cab). División Física Estadistica; Argentina;