宇宙微波背景辐射对量子卫星信道性能及纠缠储备量的影响

发布时间：2018-04-22 20:00

  本文选题：量子卫星通信 + 宇宙背景辐射　； 参考：《量子光学学报》2017年02期

【摘要】：2016年8月16日1时40分,我国长征二号运载火箭成功将世界首颗量子科学实验卫星"墨子号"发射升空。然而,有关宇宙微波背景辐射(Cosmic Microwave Background radiation,简称CMB)对量子卫星信道通信性能及纠缠储备量影响的研究,至今尚未展开。为此,本文根据CMB辐射谱与黑体辐射谱完美的拟合特性和小尺度范围内的各向异性,得到CMB绝对温度、辐射波长和黑体辐出度的关系。针对幅值阻尼信道,建立了CMB绝对温度、黑体辐出度、辐射波长、信道平均保真度和纠缠度之间的定量关系。仿真结果表明,当CMB绝对温度为2.7K和3.0K时,黑体辐出度分别为0.03 W·μm和3.72 W·μm,量子卫星信道的平均保真度和纠缠度分别为0.64、0.43和0.41、0.12。由此可见,CMB对量子卫星信道通信性能的影响极大。因此,在实际的量子卫星通信系统中,应根据不同的CMB绝对温度,自适应调节算符纠缠的幺正操作,改变信道的纠缠储备量,使信道纠缠度维持在相对稳定的状态,降低CMB对卫星信道通信性能的影响。
[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.
【作者单位】： 西安邮电大学通信与信息工程学院;西北工业大学电子信息工程学院;西安电子科技大学综合业务网国家重点实验室;
【基金】：国家自然科学基金(批准号:61172071;61201194) 陕西省自然科学基础研究计划(批准号:2014JQ8318) 陕西省国际科技合作与交流计划项目(项目编号:2015KW-013) 陕西省教育厅科研计划项目(项目编号:16JK1711)
【分类号】：O413;TN918
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本文编号：1788700