Multipartite entanglement in four-qubit cluster-class states
Quantum Physics
2009-11-13 v3
Abstract
Based on quantitative complementarity relations (QCRs), we analyze the multipartite correlations in four-qubit cluster-class states. It is proven analytically that the average multipartite correlation is entanglement monotone. Moreover, it is also shown that the mixed three-tangle is a correlation measure compatible with the QCRs in this kind of quantum states. More arrestingly, with the aid of the QCRs, a set of hierarchy entanglement measures is obtained rigorously in the present system.
Cite
@article{arxiv.0709.4642,
title = {Multipartite entanglement in four-qubit cluster-class states},
author = {Yan-Kui Bai and Z. D. Wang},
journal= {arXiv preprint arXiv:0709.4642},
year = {2009}
}
Comments
7 pages, 3 figs, version 3, some refs. are added