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arXiv 1612.01136quant-ph
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远程态制备与隐形传态的非定域性

Nonlocality in Remote State Preparation vis-a-vis Teleportation

Aiman Khan, Som Kanjilal, Dipankar Home

摘要:

研究了远程态制备(RSP)信息传输协议中量子关联的非定域性问题,给出了一个统一的非定域性参数,并对两种不同的RSP方案进行了讨论.该参数的不同之处仅在于在每种情况下使用的各自类型的本地测量。其中一个RSP方案使用单粒子投影测量,而另一个使用联合Bell基测量。有趣的是,对于每一种RSP系统,Bell-CHSH型不等式的量子力学违反虽然彼此相等,但也等于相应的Bell-CHSH型局域实在不等式的量子力学违反,从而利用非最大纠缠态的公共资源进行隐形传态。这表明,对于这样的资源状态,在信息传输中涉及的相关性的可提取的非定域性的最大量对于标准隐形传态协议和这里考虑的两个RSP方案是相同的,从而意味着隐形传态和远程状态准备之间的本质区别在于双方之间需要交换的经典信息的量,而不是潜在相关性的非局部性。

英文摘要:

The hitherto unexplored nonlocality of quantum correlations in the information transfer protocol of remote state preparation (RSP) is investigated in terms of a unified nonlocality argument formulated for teleportation as well as for two distinct RSP schemes. The argument differs only in the respective types of local measurements used in each scenario. One of the RSP schemes uses single particle projective measurements, while the other uses joint Bell-basis measurements. Interestingly, the quantum mechanical violations of the Bell-CHSH type inequalities formulated for each of the RSP setups, while being equal to each other, also turn out to be equal to that of the corresponding Bell-CHSH type local realist inequality for teleportation, using the common resource of non-maximally entangled state. This reveals that for such a resource state, the maximum amount of extractable nonlocality of correlations involved in the transfer of information is the same for the standard teleportation protocol and the two RSP schemes considered here, thereby implying that the essential difference between teleportation and remote state preparation lies in the amount of classical information required to be exchanged between parties, and not in the nonlocality of underlying correlations.

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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