论文标题
通过电子式电荷耦合设备摄像机获得的时间量子降低降低
Temporal Quantum Noise Reduction Acquired by an Electron-Multiplying Charge-Coupled-Device Camera
论文作者
论文摘要
电子 - 培养电荷耦合设备摄像机（EMCCD）已被用来观察横向空间自由度的光束中的量子噪声减少。对于时间结构域中的量子降低，通常由具有操作放大器的光二极管组成的“铲斗检测器”用于在检测器带宽内的光束中登录强度波动。但是，空间信息不可避免地被检测器冲走。在本文中，我们使用EMCCD摄像头报告了明亮双子梁中时间量子噪声减少的测量。原子rubidium蒸气池中的四波混合过程用于生成明亮的双光束光束。我们观察到相对于EMCCD摄像机捕获的图像的射击量极限，超过25％的时间量子噪声降低了。与铲斗探测器相比，EMCCD可以同时利用光的空间和时间量子特性，这将极大地利用使用量子协议的许多应用程序。
Electron-multiplying charge-coupled-device cameras (EMCCDs) have been used to observe quantum noise reductions in beams of light in the transverse spatial degree of freedom. For the quantum noise reduction in the temporal domain, "bucket detectors," usually composed of photodiodes with operational amplifiers, are used to register the intensity fluctuations in beams of light within the bandwidth of the detectors. Spatial information, however, is inevitably washed off by the detector. In this paper, we report on measurements of the temporal quantum noise reduction in bright twin beams using an EMCCD camera. The four-wave mixing process in an atomic rubidium vapor cell is used to generate the bright twin beams of light. We observe more than 25% of temporal quantum noise reduction with respect to the shot-noise limit in images captured by the EMCCD camera. Compared with bucket detectors, EMCCD makes it possible to take advantage of the spatial and temporal quantum properties of light simultaneously, which would greatly benefit many applications using quantum protocols.
