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Twin-Field Quantum Key Distribution with Local Frequency Reference.
Chen, Jiu-Peng; Zhou, Fei; Zhang, Chi; Jiang, Cong; Chen, Fa-Xi; Huang, Jia; Li, Hao; You, Li-Xing; Wang, Xiang-Bin; Liu, Yang; Zhang, Qiang; Pan, Jian-Wei.
Affiliation
  • Chen JP; <a href="https://ror.org/02557nd11">Jinan Institute of Quantum Technology</a> and CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Jinan 250101, China.
  • Zhou F; Hefei National Laboratory, <a href="https://ror.org/04c4dkn09">University of Science and Technology of China</a>, Hefei 230088, China.
  • Zhang C; <a href="https://ror.org/02557nd11">Jinan Institute of Quantum Technology</a> and CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Jinan 250101, China.
  • Jiang C; Hefei National Laboratory, <a href="https://ror.org/04c4dkn09">University of Science and Technology of China</a>, Hefei 230088, China.
  • Chen FX; <a href="https://ror.org/02557nd11">Jinan Institute of Quantum Technology</a> and CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Jinan 250101, China.
  • Huang J; Hefei National Laboratory, <a href="https://ror.org/04c4dkn09">University of Science and Technology of China</a>, Hefei 230088, China.
  • Li H; <a href="https://ror.org/02557nd11">Jinan Institute of Quantum Technology</a> and CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Jinan 250101, China.
  • You LX; Hefei National Laboratory, <a href="https://ror.org/04c4dkn09">University of Science and Technology of China</a>, Hefei 230088, China.
  • Wang XB; <a href="https://ror.org/02557nd11">Jinan Institute of Quantum Technology</a> and CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Jinan 250101, China.
  • Liu Y; Hefei National Laboratory, <a href="https://ror.org/04c4dkn09">University of Science and Technology of China</a>, Hefei 230088, China.
  • Zhang Q; State Key Laboratory of Functional Materials for Informatics, <a href="https://ror.org/04nytyj38">Shanghai Institute of Microsystem and Information Technology</a>, Chinese Academy of Sciences, Shanghai 200050, China.
  • Pan JW; State Key Laboratory of Functional Materials for Informatics, <a href="https://ror.org/04nytyj38">Shanghai Institute of Microsystem and Information Technology</a>, Chinese Academy of Sciences, Shanghai 200050, China.
Phys Rev Lett ; 132(26): 260802, 2024 Jun 28.
Article in En | MEDLINE | ID: mdl-38996307
ABSTRACT
Twin-field quantum key distribution (TFQKD) overcomes the linear rate-loss limit, which promises a boost of secure key rate over long distance. However, the complexity of eliminating the frequency differences between the independent laser sources hinders its practical application. We analyzed and determined the frequency stability requirements for implementing TFQKD using frequency-stabilized lasers. Based on this analysis, we proposed and demonstrated a simple and practical approach that utilizes the saturated absorption spectroscopy of acetylene as an absolute reference, eliminating the need for fast frequency locking to achieve TFQKD. Adopting the 4-intensity sending-or-not-sending TFQKD protocol, we experimentally demonstrated the TFQKD over 502, 301, and 201 km ultralow-loss optical fiber, respectively. We expect this high-performance scheme will find widespread usage in future intercity and free-space quantum communication networks.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2024 Document type: Article Affiliation country: China
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Add to My VHL
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XML
PubMed Links
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2024 Document type: Article Affiliation country: China