Kang Yoonshik, Cho Kiyoung, Noh Jaewoo, Vitullo Dashiell L P, Leary Cody, Raymer M G
Department of Physics, College of Natural Science, Inha University, Incheon, Republic of Korea.
Opt Express. 2010 Jan 18;18(2):1217-33. doi: 10.1364/OE.18.001217.
We propose and provide experimental evidence in support of a theory for the remote preparation of a complex spatial state of a single photon. An entangled two-photon source was obtained by spontaneous parametric down-conversion, and a double slit was placed in the path of the signal photon as a scattering object. The signal photon was detected after proper spatial filtering so that the idler photon was prepared in the corresponding single-photon state. By using a two-photon coincidence measurement, we obtained the Radon transform, at several longitudinal distances, of the single-photon Wigner distribution function modified by the double slit. The experimental results are consistent with the idler photon being in a pure state. An inverse Radon transformation can, in principle, be applied to the measured data to reconstruct the modified single-photon Wigner function, which is a complete representation of the amplitude and phase structure of the scattering object.
我们提出并提供了实验证据来支持一种关于单光子复杂空间态远程制备的理论。通过自发参量下转换获得了一个纠缠双光子源，并在信号光子的路径中放置了一个双缝作为散射物体。在进行适当的空间滤波后检测信号光子，从而使闲置光子被制备到相应的单光子态。通过使用双光子符合测量，我们在几个纵向距离处获得了由双缝修改后的单光子维格纳分布函数的拉东变换。实验结果与闲置光子处于纯态一致。原则上，可以对测量数据应用逆拉东变换来重建修改后的单光子维格纳函数，它是散射物体振幅和相位结构的完整表示。
