本文關(guān)鍵詞： 自由空間量子密鑰分發(fā) 湍流球泡模型 偏振態(tài) 誤碼率 誘騙態(tài)　出處：《光子學(xué)報(bào)》2017年07期 　論文類型：期刊論文

【摘要】：為了研究大氣湍流對(duì)自由空間量子密鑰分發(fā)的性能影響,將大氣湍流建模為空間中隨機(jī)分布的空氣球泡,利用幾何光學(xué)原理分析單光子在湍流球泡中的傳播,定量計(jì)算了經(jīng)過兩次折射后由于偏振態(tài)變化造成的光子透射率比值k和誤碼率Ep的起伏,利用蒙特卡洛方法模擬了湍流折射率隨機(jī)變化時(shí)二者的趨勢;最后推導(dǎo)了經(jīng)過湍流折射后的誘騙態(tài)空間量子密鑰分發(fā)成碼率公式并通過分析誤碼來源得到滿足成碼率需要的k值上限,建立偏振誤碼率與入射角和湍流折射率的關(guān)系并得到Ep的安全閾值.仿真結(jié)果表明當(dāng)入射角在44.8°~76.5°,湍流折射率在1~1.33范圍內(nèi)可以滿足誤碼率的上限約束.該研究為湍流條件下進(jìn)行空間量子通信實(shí)驗(yàn)提供了理論參考.
[Abstract]:In order to study the effect of atmospheric turbulence on the performance of quantum key distribution in free space, atmospheric turbulence is modeled as a randomly distributed air bubble in space. The propagation of single photon in a turbulent sphere is analyzed by geometric optics principle. The fluctuation of the photonic transmittance ratio k and the bit error rate EP caused by the change of polarization state after twice refraction are calculated quantitatively. The Monte Carlo method is used to simulate the trend of the turbulent refractive index changing randomly. Finally, the formula of quantum key distribution in decoy state space after turbulent refraction is derived, and the upper limit of k value is obtained by analyzing the source of error code. The relationship between polarization bit error rate (PER) and incident angle and turbulent refractive index is established and the safe threshold of EP is obtained. The simulation results show that the incident angle is 44.8 擄/ 76.5 擄. The refractive index of turbulence can satisfy the upper bound of bit error rate in the range of 1 ~ 1.33. This study provides a theoretical reference for the experiment of quantum communication in space under turbulent conditions.
【作者單位】： 空軍工程大學(xué)信息與導(dǎo)航學(xué)院;空軍大連通信士官學(xué)校;
【基金】：國家自然科學(xué)基金(No.61168068)資助~~
【分類號(hào)】：O413;TN918.4
【正文快照】： (2空軍大連通信士官學(xué)校,遼寧大連116600)1-50010700引言航空通信的可靠性和安全性一直以來是人們研究的重點(diǎn),自由空間量子密鑰分發(fā)可以實(shí)現(xiàn)隨機(jī)密鑰在地空雙方之間絕對(duì)安全地共享,被認(rèn)為是構(gòu)建安全航空通信鏈路和全球保密通信網(wǎng)絡(luò)的重要手段,自提出以來逐漸發(fā)展為量子通信領(lǐng)，

本文編號(hào)：1454548