Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2000-09-21
Phys. Rev. E 62, 5978 (2000)
Physics
Condensed Matter
Disordered Systems and Neural Networks
to appear in Phys. Rev. E, november (2000)
Scientific paper
10.1103/PhysRevE.62.5978
The dynamical properties of a three dimensional model glass, the frustrated Ising lattice gas (FILG) are studied by Monte Carlo simulations. We present results of compression experiments, where the chemical potential is either slowly or abruptly changed, as well as simulations at constant density. One time quantities like density and two time ones like correlations, responses and mean square displacements are measured, and the departure from equilibrium clearly characterized. The aging scenario, particularly in the case of density autocorrelations is reminiscent of spin glass phenomenology with violations of the Fluctuation-dissipation theorem, typical of systems with one replica symmetry breaking. The FILG, as a valid on-lattice model of structural glasses can be described with tools developed in spin glass theory and, being a finite dimensional model, can open the way for a systematic study of activated processes in glasses.
Arenzon Jeferson J.
Ricci-Tersenghi Federico
Stariolo Daniel A.
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