Chin. Phys. Lett.  2006, Vol. 23 Issue (6): 1379-1382    DOI:
Original Articles |
Theoretical Study of Quantum Bit Rate in Free-Space Quantum Cryptography
MA Jing1;ZHANG Guang-Yu1,2;TAN Li-Ying1
1National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001 2College of Applied Science, Harbin University of Science and Technology, Harbin 150080
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MA Jing, ZHANG Guang-Yu, TAN Li-Ying 2006 Chin. Phys. Lett. 23 1379-1382
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Abstract The quantum bit rate is an important operating parameter in free-space quantum key distribution. We introduce the measuring factor and the sifting factor, and present the expressions of the quantum bit rate based on the ideal single-photon sources and the single-photon sources with Poisson distribution. The quantum bit rate is studied in the numerical simulation for the laser links between a ground station and a satellite in a low earth orbit. The results show that it is feasible to implement quantum key distribution between a ground station and a satellite in a low earth orbit.
Keywords: 03.67.Dd      14.70.Bh      42.50.Ar      42.79.-e     
Published: 01 June 2006
PACS:  03.67.Dd (Quantum cryptography and communication security)  
  14.70.Bh (Photons)  
  42.50.Ar  
  42.79.-e (Optical elements, devices, and systems)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2006/V23/I6/01379
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MA Jing
ZHANG Guang-Yu
TAN Li-Ying
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