The ground state entanglement in the $XXZ$ model
Quantum Physics
2009-11-10 v1 Strongly Correlated Electrons
Abstract
In this paper, we investigate spin entanglement in the model defined on a -dimensional bipartite lattice. The concurrence, a measure of the entanglement between two spins, is analyzed. We prove rigorously that the ground state concurrence reaches maximum at the isotropic point. For dimensionality , the concurrence develops a cusp at the isotropic point and we attribute it to the existence of magnetic long-range order.
Cite
@article{arxiv.quant-ph/0408101,
title = {The ground state entanglement in the $XXZ$ model},
author = {Shi-Jian Gu and Guang-Shan Tian and Hai-Qing Lin},
journal= {arXiv preprint arXiv:quant-ph/0408101},
year = {2009}
}
Comments
5 pages, 2 figures