Systematic Inclusion of High-Order Multi-Spin Correlations for the Spin-$1\over2$ $XXZ$ Models
Condensed Matter
2017-08-24 v1
Abstract
We apply the microscopic coupled-cluster method (CCM) to the spin- models on both the one-dimensional chain and the two-dimensional square lattice. Based on a systematic approximation scheme of the CCM developed by us previously, we carry out high-order {\it ab initio} calculations using computer-algebraic techniques. The ground-state properties of the models are obtained with high accuracy as functions of the anisotropy parameter. Furthermore, our CCM analysis enables us to study their quantum critical behavior in a systematic and unbiased manner.
Keywords
Cite
@article{arxiv.cond-mat/9410115,
title = {Systematic Inclusion of High-Order Multi-Spin Correlations for the Spin-$1\over2$ $XXZ$ Models},
author = {R. F. Bishop and R. G. Hale and Y. Xian},
journal= {arXiv preprint arXiv:cond-mat/9410115},
year = {2017}
}
Comments
(to appear in PRL). 4 pages, ReVTeX, two figures available upon request. UMIST Preprint MA-000-0001