Spin diffusion and the spin 1/2 XXZ chain at $T=\infty$ from exact diagonalization
Condensed Matter
2009-10-30 v2
Abstract
We study the long time behavior of the zz and xx time dependent autocorrelation function of the spin 1/2 XXZ chain at by exact diagonalizations on a chain of 16 sites. We find that the numerical results for the zz correlation are very well fit by the formula From this we estimate as a function of the anisotropy of the chain and study the crossover from ballistic to diffusive behavior.
Keywords
Cite
@article{arxiv.cond-mat/9711146,
title = {Spin diffusion and the spin 1/2 XXZ chain at $T=\infty$ from exact diagonalization},
author = {Klaus Fabricius and Barry M. McCoy},
journal= {arXiv preprint arXiv:cond-mat/9711146},
year = {2009}
}
Comments
11 pages, REVTEX, 7 figures. 1 reference added