Hybrid quantum-classical approach to enhanced quantum metrology

Abstract Quantum metrology plays a fundamental role in many scientific areas. However, the complexity of engineering entangled probes and the external noise raise technological barriers for realizing the expected precision of the to-be-estimated parameter with given resources. Here, we address this...

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Autores principales:	Xiaodong Yang, Xi Chen, Jun Li, Xinhua Peng, Raymond Laflamme
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/99e4fb6ec29e4cd1be1803cd5f01c760
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spelling	oai:doaj.org-article:99e4fb6ec29e4cd1be1803cd5f01c7602021-12-02T15:23:05ZHybrid quantum-classical approach to enhanced quantum metrology10.1038/s41598-020-80070-12045-2322https://doaj.org/article/99e4fb6ec29e4cd1be1803cd5f01c7602021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-80070-1https://doaj.org/toc/2045-2322Abstract Quantum metrology plays a fundamental role in many scientific areas. However, the complexity of engineering entangled probes and the external noise raise technological barriers for realizing the expected precision of the to-be-estimated parameter with given resources. Here, we address this problem by introducing adjustable controls into the encoding process and then utilizing a hybrid quantum-classical approach to automatically optimize the controls online. Our scheme does not require any complex or intractable off-line design, and it can inherently correct certain unitary errors during the learning procedure. We also report the first experimental demonstration of this promising scheme for the task of finding optimal probes for frequency estimation on a nuclear magnetic resonance (NMR) processor. The proposed scheme paves the way to experimentally auto-search optimal protocol for improving the metrology precision.Xiaodong YangXi ChenJun LiXinhua PengRaymond LaflammeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xiaodong Yang Xi Chen Jun Li Xinhua Peng Raymond Laflamme Hybrid quantum-classical approach to enhanced quantum metrology
description	Abstract Quantum metrology plays a fundamental role in many scientific areas. However, the complexity of engineering entangled probes and the external noise raise technological barriers for realizing the expected precision of the to-be-estimated parameter with given resources. Here, we address this problem by introducing adjustable controls into the encoding process and then utilizing a hybrid quantum-classical approach to automatically optimize the controls online. Our scheme does not require any complex or intractable off-line design, and it can inherently correct certain unitary errors during the learning procedure. We also report the first experimental demonstration of this promising scheme for the task of finding optimal probes for frequency estimation on a nuclear magnetic resonance (NMR) processor. The proposed scheme paves the way to experimentally auto-search optimal protocol for improving the metrology precision.
format	article
author	Xiaodong Yang Xi Chen Jun Li Xinhua Peng Raymond Laflamme
author_facet	Xiaodong Yang Xi Chen Jun Li Xinhua Peng Raymond Laflamme
author_sort	Xiaodong Yang
title	Hybrid quantum-classical approach to enhanced quantum metrology
title_short	Hybrid quantum-classical approach to enhanced quantum metrology
title_full	Hybrid quantum-classical approach to enhanced quantum metrology
title_fullStr	Hybrid quantum-classical approach to enhanced quantum metrology
title_full_unstemmed	Hybrid quantum-classical approach to enhanced quantum metrology
title_sort	hybrid quantum-classical approach to enhanced quantum metrology
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/99e4fb6ec29e4cd1be1803cd5f01c760
work_keys_str_mv	AT xiaodongyang hybridquantumclassicalapproachtoenhancedquantummetrology AT xichen hybridquantumclassicalapproachtoenhancedquantummetrology AT junli hybridquantumclassicalapproachtoenhancedquantummetrology AT xinhuapeng hybridquantumclassicalapproachtoenhancedquantummetrology AT raymondlaflamme hybridquantumclassicalapproachtoenhancedquantummetrology
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Hybrid quantum-classical approach to enhanced quantum metrology

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