用两次局域测量探测真多体纠缠
量子物理
2007-05-23 v2
摘要
我们提出用于探测真多体纠缠的纠缠见证算符。这些见证在噪声下具有鲁棒性，且在实验中仅需两次局域测量设置，与量子比特数无关。这使得在不相应增加工作量的情况下可探测越来越多参与方的纠缠。所提见证可探测接近 GHZ、簇态和图态的态。也讨论了与 Bell 不等式的联系。
引用
@article{arxiv.quant-ph/0405165,
title = {Detecting Genuine Multipartite Entanglement with Two Local Measurements},
author = {Geza Toth and Otfried Guehne},
journal= {arXiv preprint arXiv:quant-ph/0405165},
year = {2007}
}
备注
4 pages including 1 figure, revtex4; changes before publication in PRL; discussion about Mermin's inequality added in Ref. 22