Hybrid protocol for sending-or-not-sending twin-field quantum key distribution

• DOI: 10.1364/ol.399137
• Publication Date: 2020-06-24T12:00:10Z
• Authors: Hai Xu; Xiao-Long Hu; Xun-Li Feng; Xiang-Bin Wang
• Keywords: Quantum key distribution; SIGNAL (programming language)

We propose a hybrid protocol for sending-or-not-sending (SNS) twin-field quantum key distribution: replacing the signal source by heralded single-photon (HSPS) in original SNS protocol, while decoy sources are still unchanged. Numerical simulation shows that after adopting this HSPS, performance rate and secure distance is much improved.