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Long-Distance Free-Space Measurement-Device-Independent Quantum Key Distribution.
Cao, Yuan; Li, Yu-Huai; Yang, Kui-Xing; Jiang, Yang-Fan; Li, Shuang-Lin; Hu, Xiao-Long; Abulizi, Maimaiti; Li, Cheng-Long; Zhang, Weijun; Sun, Qi-Chao; Liu, Wei-Yue; Jiang, Xiao; Liao, Sheng-Kai; Ren, Ji-Gang; Li, Hao; You, Lixing; Wang, Zhen; Yin, Juan; Lu, Chao-Yang; Wang, Xiang-Bin; Zhang, Qiang; Peng, Cheng-Zhi; Pan, Jian-Wei.
Affiliation
  • Cao Y; Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.
  • Li YH; Shanghai Branch, CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China.
  • Yang KX; Shanghai Research Center for Quantum Sciences, Shanghai 201315, China.
  • Jiang YF; Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.
  • Li SL; Shanghai Branch, CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China.
  • Hu XL; Shanghai Research Center for Quantum Sciences, Shanghai 201315, China.
  • Abulizi M; Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.
  • Li CL; Shanghai Branch, CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China.
  • Zhang W; Shanghai Research Center for Quantum Sciences, Shanghai 201315, China.
  • Sun QC; Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.
  • Liu WY; Shanghai Branch, CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China.
  • Jiang X; Shanghai Research Center for Quantum Sciences, Shanghai 201315, China.
  • Liao SK; Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.
  • Ren JG; Shanghai Branch, CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China.
  • Li H; Shanghai Research Center for Quantum Sciences, Shanghai 201315, China.
  • You L; State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, Beijing 100084, People's Republic of China.
  • Wang Z; Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.
  • Yin J; Shanghai Branch, CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China.
  • Lu CY; Shanghai Research Center for Quantum Sciences, Shanghai 201315, China.
  • Wang XB; Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.
  • Zhang Q; Shanghai Branch, CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China.
  • Peng CZ; Shanghai Research Center for Quantum Sciences, Shanghai 201315, China.
  • Pan JW; State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China.
Phys Rev Lett ; 125(26): 260503, 2020 Dec 31.
Article in En | MEDLINE | ID: mdl-33449747
Measurement-device-independent quantum key distribution (MDI-QKD), based on two-photon interference, is immune to all attacks against the detection system and allows a QKD network with untrusted relays. Since the MDI-QKD protocol was proposed, fiber-based implementations aimed at longer distance, higher key rates, and network verification have been rapidly developed. However, owing to the effect of atmospheric turbulence, MDI-QKD over a free-space channel remains experimentally challenging. Herein, by developing a robust adaptive optics system, high-precision time synchronization and frequency locking between independent photon sources located far apart, we realized the first free-space MDI-QKD over a 19.2-km urban atmospheric channel, which well exceeds the effective atmospheric thickness. Our experiment takes the first step toward satellite-based MDI-QKD. Moreover, the technology developed herein opens the way to quantum experiments in free space involving long-distance interference of independent single photons.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2020 Document type: Article Affiliation country: China Country of publication: United States
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2020 Document type: Article Affiliation country: China Country of publication: United States