Signatures of Dynamical Heterogeneity in the Structure of Glassy Free-energy Minima

Details Signatures of Dynamical Heterogeneity in the Structure of Glassy Free-energy Minima Signatures of Dynamical Heterogeneity in the Structure of Glassy Free-energy Minima

2007-11-27

arxiv.org/abs/0711.4269v1

Phys. Rev. Lett. 100, 125701 (2008)

Physics

Condensed Matter

Statistical Mechanics

5 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.100.125701

From numerical minimization of a model free energy functional for a system of hard spheres, we show that the width of the local peaks of the time-averaged density field at a glassy free-energy minimum exhibits large spatial variation, similar to that of the ``local Debye-Waller factor'' in simulations of dynamical heterogeneity. Molecular dynamics simulations starting from a particle configuration generated from the density distribution at a glassy free-energy minimum show similar spatial heterogeneity in the degree of localization, implying a direct connection between dynamical heterogeneity and the structure of glassy free energy minima.

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