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Performance analysis of free space quantum key distribution with different wavelengths
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Paper Abstract

In the free-space quantum communication, the performance of communication systems has a great degradation due to the atmospheric effects, such as atmospheric absorption, scattering and turbulence. However, quantum signals with different wavelengths is differently affected by atmospheric characteristics. In this paper, in order to investigate the effects of different wavelengths quantum signals on free-space quantum key distribution, an entanglement-based continuous variable quantum key distribution transmission model is established. Considering the influence of various atmospheric effects on quantum signals, the secret key generation rates are calculated though the homodyne detectors. The simulation results show that the long-wavelength signal can enhance the secret key generation rates at the same transmission distance. Therefore, the long-wavelength signal is more suitable for the free-space quantum transmission.

Paper Details

Date Published: 18 December 2019
PDF: 6 pages
Proc. SPIE 11339, AOPC 2019: Quantum Information Technology, 1133909 (18 December 2019); doi: 10.1117/12.2543133
Show Author Affiliations
Tao Liu, North China Electric Power Univ. (China)
Cong Zhu, North China Electric Power Univ. (China)
Chunyang Sun, North China Electric Power Univ. (China)
Xinxin Fang, North China Electric Power Univ. (China)
Pingping Wang, North China Electric Power Univ. (China)


Published in SPIE Proceedings Vol. 11339:
AOPC 2019: Quantum Information Technology
Jianyu Wang; Chaoyang Lu; Sven Höfling, Editor(s)

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