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arXiv 2103.14836quant-ph
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具有独立观测量的共享量子非定域性和真非定域性

Sharing quantum nonlocality and genuine nonlocality with independent observables

Tinggui Zhang, Shao-Ming Fei

摘要:

最近,作者在[物理。125,090401(2020)]考虑了以下场景:Alice和Bob每个都有一对纠缠量子比特状态的一半。Bob测量他的一半,然后将他的部分传递给第二个Bob,第二个Bob再次测量,依此类推。目标是最大化可以与单个Alice一起预期违反Clauser-Horne-Shimony-Holt(CHSH)不等式的Bob的数量。以最大纠缠纯二量子比特态为例,构造性地证明了任意多个独立的Bobs可以与单个Alice共享非定域性。在这里,我们证明了任意多个独立的观察者可以共享一个任意维的二体纠缠态的非定域性,但不一定是两量子比特纠缠态。进一步,以广义GHZ态为例,我们证明了至多两个Charlie可以与Alice和Bob共享单个广义GHZ态的真正非定域性。

英文摘要:

Recently the authors in [Phys. Rev. Lett. 125, 090401 (2020)] considered the following scenario: Alice and Bob each have half of a pair of entangled qubit state. Bob measures his half and then passes his part to a second Bob who measures again and so on. The goal is to maximize the number of Bobs that can have an expected violation of the Clauser-Horne-Shimony-Holt (CHSH) inequality with the single Alice. By taking the maximally entangled pure two-qubit state as an example, it has been constructively proved that arbitrarily many independent Bobs can share the nonlocality with the single Alice. Here we demonstrate that arbitrarily many independent observers can share the nonlocality of a single arbitrary dimensional bipartite entangled but not necessary two-qubit entangled state. Further, taking the generalized GHZ states as an example, we show that at most two Charlies can share the genuine nonlocality of a single generalized GHZ state with an Alice and a Bob.

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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