We propose to use correlation function analysis as a tool for the study of strong field ionization. We show, in particular, that study of the correlations of electron’s coordinate and velocity reveals patterns which can be naturally interpreted as manifestations of the electron’s exit point (the spatial point where the electron exits the tunneling barrier). This analysis provides an unambiguous definition of the exit point. The location of the exit point thus determined agrees well with the estimates used in the semiclassical simulations.

中文翻译：

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强场电离相关性分析

我们建议使用相关函数分析作为研究强场电离的工具。我们特别表明，对电子坐标和速度相关性的研究揭示了可以自然地解释为电子出口点（电子离开隧道势垒的空间点）的表现形式的模式。该分析提供了退出点的明确定义。由此确定的出口点的位置与半经典模拟中使用的估计非常吻合。