论文标题

高维量子测量的模拟性

Simulability of high-dimensional quantum measurements

论文作者

Ioannou, Marie, Sekatski, Pavel, Designolle, Sébastien, Jones, Benjamin D. M., Uola, Roope, Brunner, Nicolas

论文摘要

我们研究了高维测量的给定集合$ \ Mathcal {M} $的量子信息的压缩。这导致了一个模拟性的概念,我们要求从$ \ MATHCAL {M} $获得的统计信息和任意量子状态$ρ$通过首先首先将$ρ$压缩到较低维空间中,然后进行一些量子测量来恢复。当且仅当设置$ \ Mathcal {M} $是可以共同测量时,就可以使用完整的量子压缩,即仅留下经典信息。因此,我们的模拟性概念可以看作是测量不兼容的量化。在定义了这些概念之后,我们提供了一个涉及相互无偏见的说明性示例,并开发了一种基于用于构建仿真模型的半定义编程的方法。反过来,我们分析构建了所有遭受白噪声或损失的投影测量值的最佳模拟模型。最后,我们讨论了我们的方法如何与量子通道和量子相关性的其他概念联系在一起。

We investigate the compression of quantum information with respect to a given set $\mathcal{M}$ of high-dimensional measurements. This leads to a notion of simulability, where we demand that the statistics obtained from $\mathcal{M}$ and an arbitrary quantum state $ρ$ are recovered exactly by first compressing $ρ$ into a lower dimensional space, followed by some quantum measurements. A full quantum compression is possible, i.e., leaving only classical information, if and only if the set $\mathcal{M}$ is jointly measurable. Our notion of simulability can thus be seen as a quantification of measurement incompatibility in terms of dimension. After defining these concepts, we provide an illustrative examples involving mutually unbiased basis, and develop a method based on semi-definite programming for constructing simulation models. In turn we analytically construct optimal simulation models for all projective measurements subjected to white noise or losses. Finally, we discuss how our approach connects with other concepts introduced in the context of quantum channels and quantum correlations.

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