用光子计数直接探测量子相空间
Direct Probing of Quantum Phase Space by Photon Counting
摘要：
我们提出了一个非常简单的实验装置来测量，通过光子计数，表征两个单模光束的维格纳函数的重叠。我们表明，该方案可以应用于直接确定相空间准概率分布的单模场和在一定的限制下，可以测量的Wigner函数，而不使用层析重建算法。分析了非单位光电探测器效率的不利影响。
英文摘要：
We propose a very simple experimental setup to measure, via photon counting, the overlap of the Wigner functions characterizing two single mode light beams. We show that this scheme can be applied to determine directly the phase space quasiprobability distribution of the single mode field and in a certain limit the Wigner function can be measured without use of tomographic reconstruction algorithms. The deleterious effects of non--unit photodetector efficiency are analyzed.
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