Demonstration of fully-connected quantum communication network exploiting entangled sideband modes

作     者：Fan Li Xiaoli Zhang Jianbo Li Jiawei Wang Shaoping Shi Long Tian Yajun Wang Lirong Chen Yaohui Zheng Fan Li;Xiaoli Zhang;Jianbo Li;Jiawei Wang;Shaoping Shi;Long Tian;Yajun Wang;Lirong Chen;Yaohui Zheng

作者机构：State Key Laboratory of Quantum Optics and Quantum Optics DevicesInstitute of Opto-ElectronicsShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme OpticsShanxi UniversityTaiyuan 030006China 

出 版 物：《Frontiers of physics》 (物理学前沿（英文版）)

年 卷 期：2023年第18卷第4期

页      面：277-282页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China(NSFC)(Grant Nos.62225504,62027821,62035015,U22A6003,and 12174234) the National Key R&D Program of China(Grant No.2020YFC2200402) the Program for Sanjin Scholar of Shanxi Province. 

主　　题：quantum network quantum communication entangled sideband modes quantum dense coding 

摘      要：Quantum communication network scales point-to-point quantum communication protocols to more than two detached parties,which would permit a wide variety of quantum communication applications.Here,we demonstrate a fully-connected quantum communication network,exploiting three pairs of Einstein–Podolsky–Rosen(EPR)entangled sideband modes,with high degree entanglement of 8.0 dB,7.6 dB,and 7.2 dB.Each sideband modes from a squeezed field are spatially separated by demultiplexing operation,then recombining into new group according to network requirement.Each group of sideband modes are distributed to one of the parties via a single physical path,making sure each pair of parties build their own private communication links with high channel capacity better than any classical scheme.