Field Demonstration of Distributed Quantum Sensing without Post-Selection

Distributed quantum sensing can provide quantum-enhanced sensitivity beyond the shot-noise limit (SNL) for sensing spatially distributed parameters. To date, distributed quantum sensing experiments have mostly been accomplished in laboratory environments without a real space separation for the senso...

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Autores principales:	Si-Ran Zhao, Yu-Zhe Zhang, Wen-Zhao Liu, Jian-Yu Guan, Weijun Zhang, Cheng-Long Li, Bing Bai, Ming-Han Li, Yang Liu, Lixing You, Jun Zhang, Jingyun Fan, Feihu Xu, Qiang Zhang, Jian-Wei Pan
Formato:	article
Lenguaje:	EN
Publicado:	American Physical Society 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/ae8ee89022d84cde9bbc45e73b0b277b
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spelling	oai:doaj.org-article:ae8ee89022d84cde9bbc45e73b0b277b2021-12-02T16:39:44ZField Demonstration of Distributed Quantum Sensing without Post-Selection10.1103/PhysRevX.11.0310092160-3308https://doaj.org/article/ae8ee89022d84cde9bbc45e73b0b277b2021-07-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.11.031009http://doi.org/10.1103/PhysRevX.11.031009https://doaj.org/toc/2160-3308Distributed quantum sensing can provide quantum-enhanced sensitivity beyond the shot-noise limit (SNL) for sensing spatially distributed parameters. To date, distributed quantum sensing experiments have mostly been accomplished in laboratory environments without a real space separation for the sensors. In addition, the post-selection is normally assumed to demonstrate the sensitivity advantage over the SNL. Here, we demonstrate distributed quantum sensing with discrete variables in field and show the unconditional violation (without post-selection) of SNL up to 0.916 dB for the field distance of 240 m. The achievement is based on a loophole-free Bell test setup with entangled photon pairs at the averaged heralding efficiency of 73.88%. Moreover, to test quantum sensing in real life, we demonstrate the experiment for long distances (with 10-km fiber), together with the sensing of a completely random parameter. The results represent an important step towards a practical quantum sensing network for widespread applications.Si-Ran ZhaoYu-Zhe ZhangWen-Zhao LiuJian-Yu GuanWeijun ZhangCheng-Long LiBing BaiMing-Han LiYang LiuLixing YouJun ZhangJingyun FanFeihu XuQiang ZhangJian-Wei PanAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 11, Iss 3, p 031009 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Si-Ran Zhao Yu-Zhe Zhang Wen-Zhao Liu Jian-Yu Guan Weijun Zhang Cheng-Long Li Bing Bai Ming-Han Li Yang Liu Lixing You Jun Zhang Jingyun Fan Feihu Xu Qiang Zhang Jian-Wei Pan Field Demonstration of Distributed Quantum Sensing without Post-Selection
description	Distributed quantum sensing can provide quantum-enhanced sensitivity beyond the shot-noise limit (SNL) for sensing spatially distributed parameters. To date, distributed quantum sensing experiments have mostly been accomplished in laboratory environments without a real space separation for the sensors. In addition, the post-selection is normally assumed to demonstrate the sensitivity advantage over the SNL. Here, we demonstrate distributed quantum sensing with discrete variables in field and show the unconditional violation (without post-selection) of SNL up to 0.916 dB for the field distance of 240 m. The achievement is based on a loophole-free Bell test setup with entangled photon pairs at the averaged heralding efficiency of 73.88%. Moreover, to test quantum sensing in real life, we demonstrate the experiment for long distances (with 10-km fiber), together with the sensing of a completely random parameter. The results represent an important step towards a practical quantum sensing network for widespread applications.
format	article
author	Si-Ran Zhao Yu-Zhe Zhang Wen-Zhao Liu Jian-Yu Guan Weijun Zhang Cheng-Long Li Bing Bai Ming-Han Li Yang Liu Lixing You Jun Zhang Jingyun Fan Feihu Xu Qiang Zhang Jian-Wei Pan
author_facet	Si-Ran Zhao Yu-Zhe Zhang Wen-Zhao Liu Jian-Yu Guan Weijun Zhang Cheng-Long Li Bing Bai Ming-Han Li Yang Liu Lixing You Jun Zhang Jingyun Fan Feihu Xu Qiang Zhang Jian-Wei Pan
author_sort	Si-Ran Zhao
title	Field Demonstration of Distributed Quantum Sensing without Post-Selection
title_short	Field Demonstration of Distributed Quantum Sensing without Post-Selection
title_full	Field Demonstration of Distributed Quantum Sensing without Post-Selection
title_fullStr	Field Demonstration of Distributed Quantum Sensing without Post-Selection
title_full_unstemmed	Field Demonstration of Distributed Quantum Sensing without Post-Selection
title_sort	field demonstration of distributed quantum sensing without post-selection
publisher	American Physical Society
publishDate	2021
url	https://doaj.org/article/ae8ee89022d84cde9bbc45e73b0b277b
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Field Demonstration of Distributed Quantum Sensing without Post-Selection

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