Experimental Twin-Field Quantum Key Distribution over 1000 km Fiber Distance
University of Science and Technology of China · Hefei National Center for Physical Sciences at Nanoscale · +5 more institutions
Abstract
Quantum key distribution (QKD) aims to generate secure private keys shared by two remote parties. With its security being protected by principles of quantum mechanics, some technology challenges remain towards practical application of QKD. The major one is the distance limit, which is caused by the fact that a quantum signal cannot be amplified while the channel loss is exponential with the distance for photon transmission in optical fiber. Here using the 3-intensity sending-or-not-sending protocol with the actively-odd-parity-pairing method, we demonstrate a fiber-based twin-field QKD over 1002 km. In our experiment, we developed a dual-band phase estimation and ultra-low noise superconducting nanowire…
Citation impact
- FWCI
- 55.58
- Percentile
- 100%
- References
- 44
Authors
18- YLYang LiuCorresponding
University of Science and Technology of China, Hefei National Center for Physical Sciences at Nanoscale, Jinan Institute of Quantum Technology
- WZWeijun Zhang
Chinese Academy of Sciences, Shanghai Institute of Microsystem and Information Technology
- CJCong Jiang
University of Science and Technology of China, Jinan Institute of Quantum Technology
- JCJiu-Peng Chen
University of Science and Technology of China, Hefei National Center for Physical Sciences at Nanoscale, Jinan Institute of Quantum Technology
- CZChi Zhang
University of Science and Technology of China, Hefei National Center for Physical Sciences at Nanoscale, Jinan Institute of Quantum Technology
Topics & keywords
- Quantum key distribution
- Physics
- Photon
- Quantum network
- Key generation
- Pairing
- Quantum
- Quantum information science
Funding
- NNNational Natural Science Foundation of ChinaAwards: 61971409, T2125010, 12174215, 61971408
- CAChinese Academy of Sciences
- YIYouth Innovation Promotion Association of the Chinese Academy of SciencesAward: 2019238
- NSNatural Science Foundation of Shandong ProvinceAwards: ZR2020YQ45, ZR202209150053
- KTKey Technology Research and Development Program of ShandongAward: 2020CXGC010105
- NKNational Key Research and Development Program of ChinaAward: 2020YFA0309800