Theoretical Study of Quantum Bit Rate in Free-Space Quantum Cryptography

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-Yu^1,2;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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