Entanglement properties in (1/2,1) mixed-spin Heisenberg systems
Quantum Physics
2009-11-11 v1
Abstract
By using the concept of negativity, we investigate entanglement in (1/2,1) mixed-spin Heisenberg systems. We obtain the analytical results of entanglement in small isotropic Heisenberg clusters with only nearest-neighbor (NN) interactions up to four spins and in the four-spin Heisenberg model with both NN and next-nearest-neighbor (NNN) interactions. For more spins, we numerically study effects of temperature, magnetic fields, and NNN interactions on entanglement. We study in detail the threshold value of the temperature, after which the negativity vanishes.
Keywords
Cite
@article{arxiv.quant-ph/0508208,
title = {Entanglement properties in (1/2,1) mixed-spin Heisenberg systems},
author = {Zhe Sun and XiaoGuang Wang and AnZi Hu and You-Quan Li},
journal= {arXiv preprint arXiv:quant-ph/0508208},
year = {2009}
}
Comments
11 pages, 12 figures