Heterogeneities in Aging Models of Granular Compaction

TL;DR

This paper investigates the heterogeneous dynamics in aging models of granular compaction using kinetically constrained models, highlighting new insights into their complex behavior and extending the granular-glass analogy.

Contribution

It introduces new results on the heterogeneity of both equilibrium and non-equilibrium dynamics in granular models, deepening understanding of their complex behavior.

Findings

Revealed heterogeneities in granular aging dynamics

Extended the granular-glass analogy with new model results

Analyzed in and out of equilibrium behaviors

Abstract

Kinetically constrained models (KCM) are systems with trivial thermodynamics but often complex dynamical behavior due to constraints on the accessible paths followed by the system. Exploring these properties, the Kob-Andersen (KA) model was introduced to study the slow dynamics of glass forming liquids and later extended to granular materials. In this last context, we present new results on the heterogeneous character of both in and out of equilibrium dynamics, further stretching the granular-glass analogy.