Off equilibrium dynamics of the Frustrated Ising Lattice Gas

TL;DR

This paper investigates the off-equilibrium dynamics of the Frustrated Ising Lattice Gas model through Monte Carlo simulations, revealing aging phenomena similar to spin glasses and suggesting a potential theoretical framework for understanding structural glass behavior.

Contribution

It introduces a detailed simulation study of the FILG model's off-equilibrium properties, highlighting aging effects and drawing parallels with spin glass phenomenology.

Findings

Density autocorrelations exhibit aging behavior.

The model shows spin glass-like aging phenomena.

Potential for a spin glass theoretical description of structural glasses.

Abstract

We study by means of Monte Carlo simulations the off equilibrium properties of a model glass, the Frustrated Ising Lattice Gas (FILG) in three dimensions. We have computed typical two times quantities, like density-density autocorrelations and the autocorrelation of internal degrees of freedom. We find an aging scenario particularly interesting in the case of the density autocorrelations in real space which is very reminiscent of spin glass phenomenology. While this model captures the essential features of structural glass dynamics, its analogy with spin glasses may bring the possibility of its complete description using the tools developed in spin glass theory.