Free-space quantum links under diverse weather conditions
Free-space quantum links under diverse weather conditions
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DOI：
10.1103/physreva.96.043856
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发表时间：
2017-10-24
影响因子：
2.9
通讯作者：
Marquardt, Ch.
中科院分区：
文献类型：
--
作者：
Vasylyev, D.;Semenov, A. A.;Marquardt, Ch.
自由空间光通信链路是建立安全量子通信的重要途径。在这里，我们研究了在不同的天气条件下，包括雨或霾通过湍流大气链路的非经典光的传输。为了考虑这些效应，Vasylyev等人[D. Vasylyev等人，物理修订信函117，090501（2016）]进一步概括。它表明，理论和实验之间的良好的一致性，低强度的雨只是贡献额外的确定性损失，而阴霾也引入了额外的光束变形的透射光。在此基础上，我们从理论上研究了这种天气条件下正交压缩和高斯纠缠的传输。
Free-space optical communication links are promising channels for establishing secure quantum communication. Here we study the transmission of nonclassical light through a turbulent atmospheric link under diverse weather conditions, including rain or haze. To include these effects, the theory of light transmission through atmospheric links in the elliptic-beam approximation presented by Vasylyev et al. [D. Vasylyev et al., Phys. Rev. Lett. 117, 090501 (2016)] is further generalized. It is demonstrated, with good agreement between theory and experiment, that low-intensity rain merely contributes additional deterministic losses, whereas haze also introduces additional beam deformations of the transmitted light. Based on these results, we study theoretically the transmission of quadrature squeezing and Gaussian entanglement under these weather conditions.