Genuine correlations of tripartite system
Genuine correlations of tripartite system
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DOI：
10.1007/s11128-013-0525-9
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发表时间：
2012-06
影响因子：
2.5
通讯作者：
Liming Zhao;Xueyuan Hu;R. Yue;H. Fan
中科院分区：
文献类型：
--
作者：
Liming Zhao;Xueyuan Hu;R. Yue;H. Fan
我们定义真正的总，经典和量子相关的三方系统。真正的三重量子不和谐可以解释为三重超密集编码的“量子优势”。我们发现在对称的三分态下，对于全相关和经典相关，真正的三分相关并不小于两两相关。然而，真正的量子三方关联可以被成对的量子关联所超越。对于纯态和二阶对称态，得到了真正的三重关联的解析表达式。计算了纠缠态和可分态的真实关联。
We define genuine total, classical and quantum correlations in tripartite systems. The genuine tripartite quantum discord can be interpreted as ‘quantum advantage’ in tripartite superdense coding. We find in a symmetrical tripartite state, for total correlation and classical correlation, the genuine tripartite correlations are no less than the pair-wise correlations. However, the genuine quantum tripartite correlation can be surpassed by the pair-wise quantum correlations. Analytical expressions for genuine tripartite correlations are obtained for pure states and rank-2 symmetrical states. The genuine correlations in both entangled and separable states are calculated.