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.
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.