论文标题
Hong-ou-mandel实验：从光子不可区分到连续变量量子计算
The Hong-Ou-Mandel experiment: from photon indistinguishability to continuous variables quantum computing
论文作者
论文摘要
我们广泛讨论了洪 - 曼德尔实验，采用了原始的基于相位空间的视角。为此，我们将时间和频率变量分析为量子连续变量的完美类比，其位置和巨大颗粒的位置和动量或电磁场的四倍体。我们讨论如何使用该实验直接测量时间频Wigner函数并在这些变量中实现逻辑门。我们还简要讨论了该实验的量子/经典方面，为强度相关性提供了一般表达，以明确说明经典的hong-ou-mandel（如DIP）和量子量之间的差异。在整个手稿中，我们通常会通过自发参数下转换来基于藻类波导发射光子对的特定系统，但是我们的结果可以扩展到其他类似的实验系统和不同程度的自由度。
We extensively discuss the Hong-Ou-Mandel experiment taking an original phase-space-based perspective. For this, we analyze time and frequency variables as quantum continuous variables in perfect analogy with position and momentum of massive particles or with the electromagnetic field's quadratures. We discuss how this experiment can be used to directly measure the time-frequency Wigner function and implement logical gates in these variables. We also briefly discuss the quantum/classical aspects of this experiment providing a general expression for intensity correlations that explicit the differences between a classical Hong-Ou-Mandel like dip and a quantum one. Throughout the manuscript, we will often focus and refer to a particular system based on AlGaAs waveguides emitting photon pairs via spontaneous parametric down-conversion, but our results can be extended to other analogous experimental systems and to different degrees of freedom.
