本文選題：量子衛(wèi)星通信 + 宇宙背景輻射��； 參考：《量子光學(xué)學(xué)報》2017年02期

【摘要】：2016年8月16日1時40分,我國長征二號運(yùn)載火箭成功將世界首顆量子科學(xué)實(shí)驗(yàn)衛(wèi)星"墨子號"發(fā)射升空。然而,有關(guān)宇宙微波背景輻射(Cosmic Microwave Background radiation,簡稱CMB)對量子衛(wèi)星信道通信性能及糾纏儲備量影響的研究,至今尚未展開。為此,本文根據(jù)CMB輻射譜與黑體輻射譜完美的擬合特性和小尺度范圍內(nèi)的各向異性,得到CMB絕對溫度、輻射波長和黑體輻出度的關(guān)系。針對幅值阻尼信道,建立了CMB絕對溫度、黑體輻出度、輻射波長、信道平均保真度和糾纏度之間的定量關(guān)系。仿真結(jié)果表明,當(dāng)CMB絕對溫度為2.7K和3.0K時,黑體輻出度分別為0.03 W·μm和3.72 W·μm,量子衛(wèi)星信道的平均保真度和糾纏度分別為0.64、0.43和0.41、0.12。由此可見,CMB對量子衛(wèi)星信道通信性能的影響極大。因此,在實(shí)際的量子衛(wèi)星通信系統(tǒng)中,應(yīng)根據(jù)不同的CMB絕對溫度,自適應(yīng)調(diào)節(jié)算符糾纏的幺正操作,改變信道的糾纏儲備量,使信道糾纏度維持在相對穩(wěn)定的狀態(tài),降低CMB對衛(wèi)星信道通信性能的影響。
[Abstract]:At 01:40 on August 16, 2016, China's long March 2 launch vehicle successfully launched Mozi, the world's first quantum science experimental satellite. However, the influence of cosmic Microwave Background radiations on the channel communication performance and entanglement reserve of quantum satellites has not been studied. Therefore, according to the perfect fitting property of CMB radiation spectrum and blackbody radiation spectrum and anisotropy in small scale, the relations among CMB absolute temperature, radiation wavelength and blackbody radiance are obtained in this paper. The quantitative relationships among CMB absolute temperature, blackbody radiance, radiation wavelength, channel average fidelity and entanglement are established for amplitude damped channels. The simulation results show that the blackbody radiations are 0.03W 渭 m and 3.72W 渭 m at CMB absolute temperature of 2.7K and 3.72W 渭 m, respectively, and the average fidelity and entanglement of quantum satellite channels are 0.640.43 and 0.41g 0.12, respectively. It can be seen that CMB has a great influence on the communication performance of quantum satellite channel. Therefore, in the actual quantum satellite communication system, according to the different CMB absolute temperature, the unitary operation of the entanglement operator should be adjusted adaptively, and the channel entanglement reserve should be changed, so that the entanglement degree of the channel can be maintained in a relatively stable state. Reduce the influence of CMB on satellite channel communication performance.
【作者單位】： 西安郵電大學(xué)通信與信息工程學(xué)院;西北工業(yè)大學(xué)電子信息工程學(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(批準(zhǔn)號:61172071;61201194) 陜西省自然科學(xué)基礎(chǔ)研究計劃(批準(zhǔn)號:2014JQ8318) 陜西省國際科技合作與交流計劃項(xiàng)目(項(xiàng)目編號:2015KW-013) 陜西省教育廳科研計劃項(xiàng)目(項(xiàng)目編號:16JK1711)
【分類號】：O413;TN918
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本文編號：1788700