5 August 2015 Improving the performance of continuous variable quantum key distribution using fading effects of free-space channel
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Abstract
Quantum key distribution can be used to share secret keys with information-theoretic security between two legitimate partners for secure communication. In the case of satellite communication, free-space channel is the only way to transmit information, thus research on its properties is of great significance to quantum cryptographic communication. In this paper, we thoroughly analyze the influence of free-space channel fading effects on continuous variable quantum key distribution and for the first time prove that random distribution (such as Rayleigh distribution, Rice distribution and et al.) of free-space channel fading coefficients can be used to increase secret information rates and improve system stability against excess noises. Our results offer academic reference for practical applications of ground-space and space-space quantum communication and global quantum communication network.
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Zeyu Zhang, Zeyu Zhang, Chengrui Zhu, Chengrui Zhu, Guangqiang He, Guangqiang He, } "Improving the performance of continuous variable quantum key distribution using fading effects of free-space channel", Proc. SPIE 9619, 2015 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Optical Signal Processing, 96190B (5 August 2015); doi: 10.1117/12.2193530; https://doi.org/10.1117/12.2193530
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