语境量子计量学

IF 6.6 1区 物理与天体物理 Q1 PHYSICS, APPLIED
Jeongwoo Jae, Jiwon Lee, M. S. Kim, Kwang-Geol Lee, Jinhyoung Lee
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引用次数: 0

摘要

我们通过一个简单的线性光学实验证明,测量选择的情境性可以提高量子计量学的精度。上下文性是一种非经典属性,是各种量子信息处理任务的资源。最近的研究表明,反常弱值的情境性可以用来提高计量精度,从而揭示了情境性在量子计量学中的作用。我们的上下文量子计量学(coQM)方案可以将光学偏振测量的精度提高到量子费雪信息给出的精度极限的 6 倍。我们通过两个互补的测量来实现情境增强,而在传统方法中,要达到精度极限的一些最佳测量要么在理论上难以找到,要么在实验上无法实现。这些结果凸显了测量选择的情境性在量子计量学中的实际应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Contextual quantum metrology

Contextual quantum metrology

We demonstrate that the contextuality of measurement selection can enhance the precision of quantum metrology with a simple linear optical experiment. Contextuality is a nonclassical property known as a resource for various quantum information processing tasks. Recent studies show that contextuality by anomalous weak values can be utilized to enhance metrological precision, unraveling the role of contextuality in quantum metrology. Our contextual quantum metrology (coQM) scheme can elevate the precision of the optical polarimetry as much as 6 times the precision limit given by the Quantum Fisher Information. We achieve the contextuality-enabled enhancement with two mutually complementary measurements, whereas, in the conventional method, some optimal measurements to achieve the precision limit are either theoretically challenging to find or experimentally infeasible to realize. These results highlight that the contextuality of measurement selection is applicable in practice for quantum metrology.

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来源期刊
npj Quantum Information
npj Quantum Information Computer Science-Computer Science (miscellaneous)
CiteScore
13.70
自引率
3.90%
发文量
130
审稿时长
29 weeks
期刊介绍: The scope of npj Quantum Information spans across all relevant disciplines, fields, approaches and levels and so considers outstanding work ranging from fundamental research to applications and technologies.
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