暴風(fēng)雪對(duì)自由空間量子通信信道的影響及性能分析
[Abstract]:In order to study the influence of blizzard on quantum communication channel in free space, according to the physical properties of blizzard, the intensity of blizzard is divided into four grades. Firstly, the relationship between snowstorm weather grade and quantum channel attenuation in free space is proposed. For the depolarization channel and the phase attenuation channel, the mode equations of the weather, entanglement and fidelity of the channel are established respectively. Finally, the influence of different blizzards on the utilization of quantum channel time is analyzed. Numerical analysis and simulation results show that when the blizzard weather grade is increased from 1 to 4, The channel attenuation of free space quantum communication is increased from 0.9 to 13, the channel entanglement is reduced from 0.93 to 0.25, the fidelity is reduced from 0.97 to 0.85, and the available time utilization of the channel is reduced from 0.88 to 0.37. Therefore, in order to improve the reliability of quantum communication in free space, the parameters of the system should be adjusted adaptively according to the degree of blizzard weather disaster.
【作者單位】: 西安郵電大學(xué)電子工程學(xué)院;西北工業(yè)大學(xué)電子信息學(xué)院;西安電子科技大學(xué)綜合業(yè)務(wù)網(wǎng)國家重點(diǎn)實(shí)驗(yàn)室;
【基金】:國家自然科學(xué)基金(61172071,61201194) 陜西省自然科學(xué)基礎(chǔ)研究計(jì)劃(2014JQ8318) 陜西省國際科技合作與交流計(jì)劃項(xiàng)目(2015KW-013)
【分類號(hào)】:O413;TN918
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