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arXiv 1912.03225quant-ph
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Bell实验中的互无偏基和对称信息完全测量

Mutually unbiased bases and symmetric informationally complete measurements in Bell experiments

Armin Tavakoli, Máté Farkas, Denis Rosset, Jean-Daniel Bancal, Jędrzej Kaniewski

摘要:

相互无偏基(MUB)和对称信息完全投影仪(SIC)对于量子理论的许多概念和实践方面至关重要。在这里,我们通过以下方式发展它们在量子非定域性中的作用:i)引入分别被$d$维MUB和SIC最大违反的贝尔不等式式族,ii)证明MUB和SIC的自然操作概念的设备无关证明,以及iii)使用MUB和SIC来开发用于设备无关的量子密钥分发和设备无关的量子密钥分发的最优速率和近似最优速率协议。独立的量子随机数产生。此外,我们还提出了第一个例子的极值点的量子相关性,承认物理上不等价的量子实现。我们的结果详细地展示了两个最重要的离散希尔伯特空间结构的量子非局域性领域的基础和实际相关性。

英文摘要:

Mutually unbiased bases (MUBs) and symmetric informationally complete projectors (SICs) are crucial to many conceptual and practical aspects of quantum theory. Here, we develop their role in quantum nonlocality by: i) introducing families of Bell inequalities that are maximally violated by $d$-dimensional MUBs and SICs respectively, ii) proving device-independent certification of natural operational notions of MUBs and SICs, and iii) using MUBs and SICs to develop optimal-rate and nearly optimal-rate protocols for device independent quantum key distribution and device-independent quantum random number generation respectively. Moreover, we also present the first example of an extremal point of the quantum set of correlations which admits physically inequivalent quantum realisations. Our results elaborately demonstrate the foundational and practical relevance of the two most important discrete Hilbert space structures to the field of quantum nonlocality.

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