论文标题
与单光子雪崩二极管相机的成像纠缠相关性
Imaging entanglement correlations with a single-photon avalanche diode camera
论文作者
论文摘要
两个光子之间的空间相关性是实现许多量子成像方案的关键资源。双光子相关图的测量通常使用基于CCD技术的单点扫描探测器或单光子摄像机进行。但是，由于扫描缓慢和基于CCD的相机的较低帧速率，这两种方法的速度都有限制，从而导致数据获取时间在许多小时的顺序上。在这里，我们采用了高框架速率，单个光子雪崩二极管（SPAD）摄像机，以测量由自发参数下转换产生的双光子状态的空间关节概率分布，统计数据的统计数据超过$ 10^7 $的框架，仅在140秒内获得。我们通过违反爱因斯坦 - 波多尔斯基 - 罗森 - 罗森 - 罗森（Einstein-Podolsky-Rosen）标准的光子对之间存在空间纠缠，并具有227个sigmas。我们的工作证明了SPAD摄像机在光子相关性快速表征中的潜力，从而导致了实时量子成像的道路。
Spatial correlations between two photons are the key resource in realising many quantum imaging schemes. Measurement of the bi-photon correlation map is typically performed using single-point scanning detectors or single-photon cameras based on CCD technology. However, both approaches are limited in speed due to the slow scanning and the low frame-rate of CCD-based cameras, resulting in data acquisition times on the order of many hours. Here we employ a high frame rate, single photon avalanche diode (SPAD) camera, to measure the spatial joint probability distribution of a bi-photon state produced by spontaneous parametric down-conversion, with statistics taken over $10^7$ frames acquired in just 140 seconds. We verified the presence of spatial entanglement between our photon pairs through the violation of an Einstein-Podolsky-Rosen criterion, with a confidence level of 227 sigmas. Our work demonstrates the potential of SPAD cameras in the rapid characterisation of photon correlations, leading the way towards quantum imaging in real-time.
