两对量子比特最多能纠缠到什么程度?
量子物理
2009-11-06 v2
摘要
我们描述了一个四量子比特的纯态,其单量子比特密度矩阵均为最大混合态,且作为两对量子比特系统时的平均纠缠度看似最大。
引用
@article{arxiv.quant-ph/0005013,
title = {How entangled can two couples get?},
author = {A. Higuchi and A. Sudbery},
journal= {arXiv preprint arXiv:quant-ph/0005013},
year = {2009}
}
备注
9 pages. Note added about the robustness of the entanglement in the four-qubit state described in the paper. Version to be published in Phys. Lett. A