Pugh Christopher J, Kolenderski Piotr, Scarcella Carmelo, Tosi Alberto, Jennewein Thomas
Opt Express. 2016 Sep 5;24(18):20947-55. doi: 10.1364/OE.24.020947.
Correlated photon pairs produced by a spontaneous parametric down conversion (SPDC) process can be used for secure quantum communication over long distances including free space transmission over a link through turbulent atmosphere. We experimentally investigate the possibility to utilize the intrinsic strong correlation between the pump and output photon spatial modes to mitigate the negative targeting effects of atmospheric beam wander. Our approach is based on a demonstration observing the deflection of the beam on a spatially resolved array of single photon avalanche diodes (SPAD-array).
由自发参量下转换（SPDC）过程产生的关联光子对可用于长距离的安全量子通信，包括通过湍流大气链路进行自由空间传输。我们通过实验研究利用泵浦光子与输出光子空间模式之间固有的强相关性来减轻大气光束漂移的负面瞄准效应的可能性。我们的方法基于在单光子雪崩二极管空间分辨阵列（SPAD阵列）上观察光束偏转的演示。
