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
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
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.
MA Jing;ZHANG Guang-Yu;TAN Li-Ying. Theoretical Study of Quantum Bit Rate in Free-Space Quantum Cryptography[J]. 中国物理快报, 2006, 23(6): 1379-1382.
MA Jing, ZHANG Guang-Yu, TAN Li-Ying. Theoretical Study of Quantum Bit Rate in Free-Space Quantum Cryptography. Chin. Phys. Lett., 2006, 23(6): 1379-1382.
2006, Vol. 23 
