Glassy timescale divergence and anomalous coarsening in a kinetically constrained spin chain

Details Glassy timescale divergence and anomalous coarsening in a kinetically constrained spin chain Glassy timescale divergence and anomalous coarsening in a kinetically constrained spin chain

1999-04-09

arxiv.org/abs/cond-mat/9904136v2

Phys. Rev. Lett 83, 3238 (1999)

Physics

Condensed Matter

Statistical Mechanics

4 pages, revtex, includes two eps figures. Proof of energy barrier hierarchy added. Version to be published in Phys Rev Lett

Scientific paper

10.1103/PhysRevLett.83.3238

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.

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