Title | Recycling nonlocality in quantum star networks |
Author | |
Corresponding Author | Gisin, Nicolas; Tavakoli, Armin; Fan, Jingyun |
Publication Years | 2023-02-13
|
DOI | |
Source Title | |
EISSN | 2643-1564
|
Volume | 5Issue: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]:0
|
Document Type | Journal Article |
Identifier | http://kc.sustech.edu.cn/handle/2SGJ60CL/502150 |
Department | Department 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 Affilication | Department of Physics; Institute for Quantum Science and Engineering |
Corresponding Author Affilication | Department of Physics; Institute for Quantum Science and Engineering; Southern University of Science and Technology |
First Author's First Affilication | Department 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).
|
Files in This Item: | ||||||
File Name/Size | DocType | Version | Access | License | ||
2023-PhysRevResearch(861KB) | Restricted Access | -- |
|
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment