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arXiv 1709.09124quant-ph
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Bell对角态及以后的局域隐态模型

Local-hidden-state models for Bell diagonal states and beyond

Fu-Lin Zhang, Yuan-Yuan Zhang

摘要:

对于一个由两个观察者Alice和Bob共享的二分纠缠态,Alice可以通过在她的一半上选择不同的测量来影响留给Bob的后测量态。当且仅当非规范化后测状态不能用局部隐态模型(LHS)描述时,爱丽丝才能说服鲍勃她有这样的能力。在这种情况下,状态被称为从Alice到Bob可操纵。通过将两量子比特Bell对角态的LHS模型构造问题转化为Werner态的LHS模型构造问题,得到了Jevtic \textit{et al.} [J. Opt. Soc. Am. B32,A40(2015)],其通过使用转向椭球形式主义来开发。这种转换也使我们能够推导出任何两量子比特状态的不可操纵性的充分判据。

英文摘要:

For a bipartite entangled state shared by two observers, Alice and Bob, Alice can affect the post-measured states left to Bob by choosing different measurements on her half. Alice can convince Bob that she has such an ability if and only if the unnormalized postmeasured states cannot be described by a local-hidden-state (LHS) model. In this case, the state is termed steerable from Alice to Bob. By converting the problem to construct LHS models for two-qubit Bell diagonal states to the one for Werner states, we obtain the optimal models given by Jevtic \textit{et al.} [J. Opt. Soc. Am. B 32, A40 (2015)], which are developed by using the steering ellipsoid formalism. Such conversion also enables us to derive a sufficient criterion for unsteerability of any two-qubit state.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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