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arXiv 1407.8233quant-phmath-phmath.MP
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随机纯态对贝尔不等式的破坏

Violations of Bell inequalities from random pure states

Max R. Atkin, Stefan Zohren

摘要:

我们考虑随机纯态对贝尔不等式的预期违反。更确切地说,我们专注于一个稍微广义版本的CGLMP不等式,这涉及到双方的贝尔实验,两个测量选项和N的结果,并分析其预期的量子违反从随机纯态为不同的N,假设的最佳测量算子。可以看出,对于小N的贝尔不等式是不违反平均,而对于较大的N,它是。两个合奏的非结构化以及结构化的随机纯态。使用随机矩阵理论的技术,这是获得解析小和大N和数值为中间N。结果显示了随机矩阵理论不同方面的美丽相互作用,从Marchenko-Pastur分布和固定迹系综到O(n)模型。

英文摘要:

We consider the expected violations of Bell inequalities from random pure states. More precisely, we focus on a slightly generalised version of the CGLMP inequality, which concerns Bell experiments of two parties, two measurement options and N outcomes and analyse their expected quantum violations from random pure states for varying N, assuming the conjectured optimal measurement operators. It is seen that for small N the Bell inequality is not violated on average, while for larger N it is. Both ensembles of unstructured as well as structured random pure states are considered. Using techniques from random matrix theory this is obtained analytically for small and large N and numerically for intermediate N. The results show a beautiful interplay of different aspects of random matrix theory, ranging from the Marchenko-Pastur distribution and fixed-trace ensembles to the O(n) model.

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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