Boucher Pauline, Defienne Hugo, Gigan Sylvain
Opt Lett. 2021 Sep 1;46(17):4200-4203. doi: 10.1364/OL.425372.
The ability to engineer the properties of quantum optical states is essential for quantum information processing applications. Here, we demonstrate tunable control of spatial correlations between photon pairs produced by spontaneous parametric down-conversion, and measure them using an electron multiplying charge coupled device (EMCCD) camera. By shaping the spatial pump beam profile in a type-I collinear configuration, we tailor the spatial structure of coincidences between photon pairs entangled in high dimensions without effect on intensity. The results highlight fundamental aspects of spatial coherence and hold potential for the development of quantum technologies based on high-dimensional spatial entanglement.
对量子光学态的特性进行工程设计的能力对于量子信息处理应用至关重要。在此，我们展示了对自发参量下转换产生的光子对之间空间相关性的可调谐控制，并使用电子倍增电荷耦合器件（EMCCD）相机对其进行测量。通过在I型共线配置中塑造空间泵浦光束轮廓，我们在不影响强度的情况下定制了高维纠缠光子对之间符合计数的空间结构。这些结果突出了空间相干的基本方面，并为基于高维空间纠缠的量子技术发展具有潜力。
