Asymptotic aging in structural glasses

TL;DR

This paper investigates the aging process in structural glasses using advanced Monte Carlo simulations, revealing phase transition behavior and confirming the full-aging scenario at large timescales.

Contribution

It introduces a non-local Monte Carlo method to study glass aging, achieving equilibrium at lower temperatures and large waiting times, and provides evidence for phase transition and full-aging scaling.

Findings

Fluctuation-dissipation ratio is dynamics-independent.

Supports the full-aging scaling behavior.

Evidence for a phase transition in glass aging.

Abstract

Using a non-local Monte Carlo algorithm, we study the aging of a fragile glass, being able to follow it up to equilibibrium down to 0.89 Tmc (Tmc is the Mode-Coupling temperature) and up to unprecedentedly large waiting times at lower temperatures. We show that the fluctuation-dissipation ratio is independent of the dynamics chosen and is compatible with a phase transition, and that the scaling behaviour of the aging part of the correlation supports the full-aging scenario.