Nonlocality of symmetric states.
Nonlocality of symmetric states.
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DOI：
10.1103/physrevlett.108.210407
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发表时间：
2011-12
影响因子：
8.6
通讯作者：
Zizhu Wang;D. Markham
中科院分区：
文献类型：
--
作者：
Zizhu Wang;D. Markham
本文研究了n个量子比特的置换对称态的非定域性质。我们表明，所有这些国家是非本地的，通过一个扩展版本的哈代悖论和相关的不平等。自然扩展的悖论和不等式的开发，涉及不同的纠缠类不同的非局部功能。属于一个给定的纠缠类将保证违反相关的贝尔不等式，看到相关的持续性的子集的球员，而有国家以外的类不违反。
In this Letter we study the nonlocal properties of permutation symmetric states of n qubits. We show that all these states are nonlocal, via an extended version of the Hardy paradox and associated inequalities. Natural extensions of both the paradoxes and the inequalities are developed which relate different entanglement classes to different nonlocal features. Belonging to a given entanglement class will guarantee the violation of associated Bell inequalities which see the persistence of correlations to subsets of players, whereas there are states outside that class which do not violate.