Glassy timescale divergence and anomalous coarsening in a kinetically constrained spin chain
Statistical Mechanics
2007-05-23 v2
Abstract
We analyse the out of equilibrium behavior of an Ising spin chain with an asymmetric kinetic constraint after a quench to a low temperature T. In the limit T\to 0, we provide an exact solution of the resulting coarsening process. The equilibration time exhibits a `glassy' divergence \teq=\exp(const/T^2) (popular as an alternative to the Vogel-Fulcher law), while the average domain length grows with a temperature dependent exponent, \dbar ~ t^{T\ln 2}. We show that the equilibration time \teq also sets the timescale for the linear response of the system at low temperatures.
Keywords
Cite
@article{arxiv.cond-mat/9904136,
title = {Glassy timescale divergence and anomalous coarsening in a kinetically constrained spin chain},
author = {Peter Sollich and Martin R Evans},
journal= {arXiv preprint arXiv:cond-mat/9904136},
year = {2007}
}
Comments
4 pages, revtex, includes two eps figures. Proof of energy barrier hierarchy added. Version to be published in Phys Rev Lett