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 

机构地区：[1]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shanxi University,Taiyuan 030006,China [2]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China

出　　处：《Frontiers of physics》2023年第4期277-282,共6页物理学前沿（英文版）

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.

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.

关 键 词：quantum network quantum communication entangled sideband modes quantum dense coding 

分 类 号：O413[理学—理论物理]