Structure and structure relaxation
Disordered Systems and Neural Networks
2011-08-12 v1
Abstract
A discrete--dynamics model, which is specified solely in terms of the system's equilibrium structure, is defined for the density correlators of a simple fluid. This model yields results for the evolution of glassy dynamics which are identical with the ones obtained from the mode-coupling theory for ideal liquid--glass transitions. The decay of density fluctuations outside the transient regime is shown to be given by a superposition of Debye processes. The concept of structural relaxation is given a precise meaning. It is proven that the long-time part of the mode-coupling-theory solutions is structural relaxation, while the transient motion merely determines an overall time scale for the glassy dynamics.
Cite
@article{arxiv.cond-mat/9807017,
title = {Structure and structure relaxation},
author = {T. Franosch and W. Götze and M. R. Mayr and A. P. Singh},
journal= {arXiv preprint arXiv:cond-mat/9807017},
year = {2011}
}