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arXiv 1908.05053quant-ph
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强酉测不准关系

Strong unitary uncertainty relations

Bing Yu, Naihuan Jing, Xianqing Li-Jost

摘要:

本文利用几何算术平均不等式,利用一系列不等式,给出了酉算子的一组新的不确定原理。由于这些不等式与著名的Cauchy-Schwarz不等式相比是“细粒度的”,因此我们的框架自然地改进了基于后者的结果。因此,基于我们的方法的酉不确定性关系优于[Phys. Rev. Lett. 2018年12月20日[2018年12月20日]明确的例子酉不确定性关系提供支持我们的主张。

英文摘要:

In this paper we provide a new set of uncertainty principles for unitary operators using a sequence of inequalities with the help of the geometric-arithmetic mean inequality. As these inequalities are "fine-grained" compared with the well-known Cauchy-Schwarz inequality, our framework naturally improves the results based on the latter. As such, the unitary uncertainty relations based on our method outperform the best known bound introduced in [Phys. Rev. Lett. 120, 230402 (2018)] to some extent. Explicit examples of unitary uncertainty relations are provided to back our claims.

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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