Sending-or-Not-Sending with Independent Lasers: Secure Twin-Field Quantum Key Distribution over 509 km

Chen, Jiu-Peng; Zhang, Chi; Liu, Yang; Jiang, Cong; Zhang, Weijun; Hu, Xiao‐Long; Guan, Jian-Yu; Yu, Zong‐Wen; Hai, Xu; Lin, Jin; Li, Ming-Jun; Chen, Hao; Li, Hao; You, Lixing; Wang, Zhen; Wang, Xiang‐Bin; Zhang, Qiang; Pan, Jian-Wei

doi:10.1103/physrevlett.124.070501

Public

Sending-or-Not-Sending with Independent Lasers: Secure Twin-Field Quantum Key Distribution over 509 km

Published in Physical Review Letters • Feb 20, 2020

Authors:

Jiu-Peng Chen

Chi Zhang

Yang Liu

Abstract

Twin-field (TF) quantum key distribution (QKD) promises high key rates over long distances to beat the rate-distance limit. Here, applying the sending-or-not-sending TF QKD protocol, we experimentally demonstrate a secure key distribution that breaks the absolute key-rate limit of repeaterless QKD o...

Subject

Quantum key distribution

Laser

Key (lock)

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