近海污染大气对自由空间量子通信性能的影响
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TN929.1

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国家自然科学基金(11504176,61601230);江苏省自然科学基金青年基金(BK20141004)


Influence of Coastal Air Pollution on the Performance of Free-space Quantum Communication
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    摘要:

    自由空间是量子保密通信的重要应用场景之一。近海地区,大气湿度和各种污染大气气溶胶粒子会导致量子链路性能的衰减。基于Mie散射理论,结合近海地区空气湿度对气溶胶粒径及复折射率的影响,计算吸湿后近海污染大气气溶胶的消光系数。根据气溶胶的粒度谱分布函数,分析近海污染大气气溶胶粒子浓度与星地量子链路衰减、量子链路效率及信道纠缠度之间的关系。针对比特翻转噪声及相位阻尼噪声,研究量子隐形传态保真度的变化。结果表明,近海地区大气相对湿度为80%的环境下,当传输距离为6 km,气溶胶粒子数浓度为60 cm-3时,对应的链路衰减系数、链路效率、幅值阻尼信道量子纠缠度分别为1.7 dB、2.02×10-6、0.457。仿真结果可为近海地区量子通信系统的设计与优化提供参考。

    Abstract:

    Free space is one of the important application scenarios of quantum secure communication. In offshore areas, the changes of atmospheric humidity and the concentration of various polluted atmospheric aerosol particles will inevitably lead to the degradation of quantum link performance. Considering the influence of air humidity on aerosol particle size and complex refractive index, Mie scattering theory is used to calculate the extinction coefficient of polluted aerosol over coastal water. According to the aerosol particle size distribution function, the relationship between the concentration of polluted aerosol particles over coastal water and the attenuation of satellite ground quantum link, the efficiency of quantum link and the channel entanglement is analyzed. The fidelities of quantum teleportation are studied for the bit reversal noise and the phase damping noise. The simulation results show that when the relative humidity is 80%, the transmission distance is 6km and the aerosol particle concentration is 60cm-3, the corresponding link attenuation, link efficiency, and channel entanglement are 1.7dB、2.02×10-6、0.457 respectively. The quantitative relationship between the parameters proposed in this paper can provide a reference for the design and optimization of quantum communication system in coastal areas.

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张秀再,周丽娟,董千恒,等. 近海污染大气对自由空间量子通信性能的影响[J]. 科学技术与工程, 2022, 22(32): 14267-14274.
Zhang Xiuzai, Zhou Lijuan, Dong Qianheng, et al. Influence of Coastal Air Pollution on the Performance of Free-space Quantum Communication[J]. Science Technology and Engineering,2022,22(32):14267-14274.

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  • 收稿日期:2022-02-22
  • 最后修改日期:2022-08-16
  • 录用日期:2022-07-06
  • 在线发布日期: 2022-12-05
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