On the Study of Collective Dynamics in Supercooled Liquids through the Statistics of the Iso-Configurational Ensemble

TL;DR

This paper investigates the structure-dynamic correlations in supercooled liquids using the isoconfigurational ensemble, analyzing statistical errors, spatial distributions, and anisotropy of particle motion to understand collective dynamics.

Contribution

It introduces methods to quantify statistical errors, spatial distributions, and anisotropy in the dynamic propensity of particles in supercooled liquids.

Findings

Quantified the statistical error of dynamic propensity.

Mapped the spatial distribution of particle non-Gaussian parameter.

Established the anisotropy of particle motion directions.

Abstract

The use of the isoconfigurational ensemble to explore structure-dynamic correlations in supercooled liquids is examined. The statistical error of the dynamic propensity and its spatial distribution are determined. The authors present the spatial distribution of the particle non-Gaussian parameter as a measure of the intermittency with which particles exhibit their propensity for motion. The ensemble average of the direction of particle motion is introduced to establish the anisotropy of the dynamic propensity.