论文标题
自适应 - 启用量子通信：日间时间到地点链接的技术
Adaptive-optics-enabled quantum communication: A technique for daytime space-to-Earth links
论文作者
论文摘要
在日光下自由空间量子通信的先前演示对于全球尺度量子网络的开发而言是重要的。到目前为止，没有人仔细调整他们的大气通道，以重现白天的天空光芒和倾斜的湍流条件，因为它们存在于太空和地球之间。在本文中，我们报告了代表空间白天下行链路的条件下的量子通信领域实验。高阶自适应光学元件提高了量子通道的效率，远远超出了单独使用尖端/倾斜校正的量子，而在衍射极限处的空间过滤拒绝了光学噪声，而无需超鼻涕光谱滤波器。在白天在广泛的通道辐射和湍流条件下，证明了高信号到噪声概率和低量子误差速率在白天在倾斜路径传播的范围内得到证明。量化并讨论了基于卫星的量子密钥分布的好处。
Previous demonstrations of free-space quantum communication in daylight have been touted as significant for the development of global-scale quantum networks. Until now, no one has carefully tuned their atmospheric channel to reproduce the daytime sky radiance and slant-path turbulence conditions as they exist between space and Earth. In this article we report a quantum communication field experiment under conditions representative of daytime downlinks from space. Higher-order adaptive optics increased quantum channel efficiencies far beyond those possible with tip/tilt correction alone while spatial filtering at the diffraction limit rejected optical noise without the need for an ultra-narrow spectral filter. High signal-to-noise probabilities and low quantum-bit-error rates were demonstrated over a wide range of channel radiances and turbulence conditions associated with slant-path propagation in daytime. The benefits to satellite-based quantum key distribution are quantified and discussed.
