2018/05/31 by Hua-Lei Yin, Hua‐Lei Yin, Yao Fu · 6 citations
Computer Science · Physics and Astronomy · #Algorithm #BB84 #Channel (broadcasting) #Computer network #Computer science #Computer security #Cryptography #Encoding (memory) #Key (lock) #Key generation #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum channel #Quantum information #Quantum key distribution #Quantum mechanics #Qubit #Repeater (horology) #Secure transmission #Telecommunications #Transmission (telecommunications) #Transmittance #quant-ph
paper · pdf · doi:10.1038/s41598-019-39454-1
published as Scientific Reports 9, 3045 (2019) · 29 pages, 4 figures, The security of TF-QKD with single-photon Bell state measurement
openalex publication_date 2019/02/28 · arxiv created 2019/03/21 · arxiv updated 2019/03/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The ultimate aim of quantum key distribution (QKD) is improving the transmission distance and key generation speed. Unfortunately, it is believed to be limited by the secret-key capacity of quantum channel without quantum repeater. Recently, a novel twin-field QKD (TF-QKD) is proposed to break through the limit, where the key rate is proportional to the square-root of channel transmittance. Here, by using the vacuum and one-photon state as a qubit, we show that the TF-QKD can be regarded as a measurement-device-independent QKD (MDI-QKD) with single-photon Bell state measurement. Therefore, the MDI property of TF-QKD can be understood clearly. Importantly, the universal security proof theories can be directly used for TF-QKD, such as BB84 encoding, six-state encoding and reference-frame-independent scheme. Furthermore, we propose a feasible experimental scheme for the proof-of-principle experimental demonstration.