Detecting genuine multipartite entanglement with two local measurements.
Detecting genuine multipartite entanglement with two local measurements.
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DOI：
10.1103/physrevlett.94.060501
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发表时间：
2004-05
影响因子：
8.6
通讯作者：
G. Tóth;O. Gühne
中科院分区：
文献类型：
--
作者：
G. Tóth;O. Gühne
我们提出纠缠见证算子来检测真正的多方纠缠。这些见证物对噪声具有鲁棒性，并且在实验中使用时仅需要两个本地测量设置，与量子位的数量无关。这允许检测越来越多的参与方的纠缠，而无需相应增加工作量。目击者展示了接近 Greenberger-Horne-Zeilinger、簇和图状态的检测状态。还讨论了与贝尔不等式的联系。
We present entanglement witness operators for detecting genuine multipartite entanglement. These witnesses are robust against noise and require only two local measurement settings when used in an experiment, independent of the number of qubits. This allows detection of entanglement for an increasing number of parties without a corresponding increase in effort. The witnesses presented detect states close to Greenberger-Horne-Zeilinger, cluster, and graph states. Connections to Bell inequalities are also discussed.