Department of Information Engineering, University of Padova, via Gradenigo 6/B, 35131 Padova, Italy.
Phys Rev Lett. 2012 Nov 16;109(20):200502. doi: 10.1103/PhysRevLett.109.200502. Epub 2012 Nov 14.
The study of the free-space distribution of quantum correlations is necessary for any future application of quantum and classical communication aiming to connect two remote locations. Here we study the propagation of a coherent laser beam over 143 km (between Tenerife and La Palma Islands of the Canary archipelagos). By attenuating the beam we also studied the propagation at the single photon level. We investigated the statistic of arrival of the incoming photons and the scintillation of the beam. From the analysis of the data, we propose the exploitation of turbulence to improve the signal to noise ratio of the signal.
自由空间量子关联分布的研究对于任何旨在连接两个远程位置的量子和经典通信的未来应用都是必要的。在这里，我们研究了相干激光束在 143 公里（特内里费岛和拉帕尔马岛之间）上的传播。通过衰减光束，我们还研究了单光子水平的传播。我们研究了入射光子的到达统计和光束的闪烁。从数据分析中，我们提出利用湍流来提高信号的信噪比。
