Entanglement in spin-one Heisenberg chains
Quantum Physics
2009-11-11 v1
Abstract
By using the concept of negativity, we study entanglement in spin-one Heisenberg chains. Both the bilinear chain and the bilinear-biquadratic chain are considered. Due to the SU(2) symmetry, the negativity can be determined by two correlators, which greatly facilitate the study of entanglement properties. Analytical results of negativity are obtained in the bilinear model up to four spins and the two-spin bilinear-biquadratic model, and numerical results of negativity are presented. We determine the threshold temperature before which the thermal state is doomed to be entangled.
Cite
@article{arxiv.quant-ph/0501032,
title = {Entanglement in spin-one Heisenberg chains},
author = {XiaoGuang Wang and HaiBin Li and Zhe Sun and You-Quan Li},
journal= {arXiv preprint arXiv:quant-ph/0501032},
year = {2009}
}
Comments
7 pages and 4 figures