中文版 | English
Title

Recycling nonlocality in quantum star networks

Author
Corresponding AuthorGisin, Nicolas; Tavakoli, Armin; Fan, Jingyun
Publication Years
2023-02-13
DOI
Source Title
EISSN
2643-1564
Volume5Issue:1
Abstract

The nonlocality of an entangled qubit pair can be recycled for several Bell experiments. Here, we go beyond standard Bell scenarios and investigate the recycling of nonlocal resources in a quantum network. First, we show that the ability to recycle nonlocality can be independent of the size of the network. Then, we realize a photonic quantum three-branch star network in which three sources of entangled pairs independently connect three outer parties with a central node. After measuring, each outer party respectively relays their system to an independent secondary measuring party. We experimentally demonstrate that the outer parties can perform unsharp measurements that are strong enough to violate a network Bell inequality with the central party, but weak enough to maintain sufficient entanglement in the network to allow the three secondary parties to do the same. Moreover, the violations are strong enough to exclude any model based on standard projective measurements on the Einstein-Podolsky-Rosen pairs emitted in the network. Our experiment brings together the research program of recycling quantum resources with that of Bell nonlocality in networks.;The nonlocality of an entangled qubit pair can be recycled for several Bell experiments. Here, we go beyond standard Bell scenarios and investigate the recycling of nonlocal resources in a quantum network. First, we show that the ability to recycle nonlocality can be independent of the size of the network. Then, we realize a photonic quantum three-branch star network in which three sources of entangled pairs independently connect three outer parties with a central node. After measuring, each outer party respectively relays their system to an independent secondary measuring party. We experimentally demonstrate that the outer parties can perform unsharp measurements that are strong enough to violate a network Bell inequality with the central party, but weak enough to maintain sufficient entanglement in the network to allow the three secondary parties to do the same. Moreover, the violations are strong enough to exclude any model based on standard projective measurements on the Einstein-Podolsky-Rosen pairs emitted in the network. Our experiment brings together the research program of recycling quantum resources with that of Bell nonlocality in networks.

URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
First ; Corresponding
Funding Project
Key-Area Research and Development Program of Guangdong Province[
WOS Research Area
Physics ; Physics
WOS Subject
Physics, Multidisciplinary ; Physics, Multidisciplinary
WOS Accession No
WOS:000936577700007
Publisher
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:1
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/502150
DepartmentDepartment of Physics
量子科学与工程研究院
Affiliation
1.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Dept Phys, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Guangdong Prov Key Lab Quantum Sci & Engn, Shenzhen 518055, Peoples R China
3.Univ Padua, Dipartimento Fis, Astron G Galilei, I-35131 Padua, Italy
4.Austrian Acad Sci, Inst Quantum Opt & Quantum Informat IQOQI Vienna, Boltzmanngasse 3, A-1090 Vienna, Austria
5.Tech Univ Wien, Atominstitut, Stadionallee 2, A-1020 Vienna, Austria
6.Univ Geneva, Grp Appl Phys, CH-1211 Geneva 4, Switzerland
7.Constructor Univ, CH-1211 Geneva 4, Switzerland
8.Southern Univ Sci & Technol, Ctr Adv Light Source, Shenzhen 518055, Peoples R China
First Author AffilicationDepartment of Physics;  Institute for Quantum Science and Engineering
Corresponding Author AffilicationDepartment of Physics;  Institute for Quantum Science and Engineering;  Southern University of Science and Technology
First Author's First AffilicationDepartment of Physics;  Institute for Quantum Science and Engineering
Recommended Citation
GB/T 7714
Mao, Ya-Li,Li, Zheng-Da,Steffinlongo, Anna,et al. Recycling nonlocality in quantum star networks[J]. PHYSICAL REVIEW RESEARCH,2023,5(1).
APA
Mao, Ya-Li.,Li, Zheng-Da.,Steffinlongo, Anna.,Guo, Bixiang.,Liu, Biyao.,...&Fan, Jingyun.(2023).Recycling nonlocality in quantum star networks.PHYSICAL REVIEW RESEARCH,5(1).
MLA
Mao, Ya-Li,et al."Recycling nonlocality in quantum star networks".PHYSICAL REVIEW RESEARCH 5.1(2023).
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