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arXiv 1806.04744quant-ph
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GHZ状态的并行自测试及其图解证明

Parallel Self-Testing of the GHZ State with a Proof by Diagrams

Spencer Breiner, Amir Kalev, Carl A. Miller

摘要:

量子自我测试解决了以下问题:即使当一个人的测量设备完全不可信时,是否有可能验证多体状态的存在?在过去的几年里,这个问题已经出现了大量的活动,特别是随着并行自测试(即,一次测试一个状态的几个副本),这不仅应用于量子密码学,而且还应用于量子计算。在这项工作中,我们给出了第一个容错并行自检在三方(而不是两方)的情况下,通过显示,任意数量的GHZ状态的副本可以进行自检。为了处理三方设置的额外复杂性,我们使用基于分类量子力学的图解证明,而不是典型的符号证明。图解方法允许在证明中出现的复杂张量网络的操作,并给出了图像语言在量子信息中的重要性的演示。

英文摘要:

Quantum self-testing addresses the following question: is it possible to verify the existence of a multipartite state even when one's measurement devices are completely untrusted? This problem has seen abundant activity in the last few years, particularly with the advent of parallel self-testing (i.e., testing several copies of a state at once), which has applications not only to quantum cryptography but also quantum computing. In this work we give the first error-tolerant parallel self-test in a three-party (rather than two-party) scenario, by showing that an arbitrary number of copies of the GHZ state can be self-tested. In order to handle the additional complexity of a three-party setting, we use a diagrammatic proof based on categorical quantum mechanics, rather than a typical symbolic proof. The diagrammatic approach allows for manipulations of the complicated tensor networks that arise in the proof, and gives a demonstration of the importance of picture-languages in quantum information.

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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