Describing the ionization of an atom exposed to a strong laser field entails computationally expensive quantum simulations based on the numerical solutions of the time-dependent Shrödinger equation. The well-known Simple Man Model provides a qualitatively accurate description of the ionization process. Here, we propose a quantum generalization of the physical picture given by the Simple Man Model. We describe an approximate solution to the Heisenberg operator equations of motion for an atom in a laser field. We provide justification of this generalization and test its validity by applying it to calculate the coordinate and velocity autocorrelation functions. Both our model and results of the ab initio numerical calculations show distinct types of correlations due to different types of electron’s motion providing insight into the strong field ionization dynamics.

描述暴露于强激光场的原子的电离势必需要基于时间依赖的Shrödinger方程的数值解的计算昂贵的量子模拟。众所周知的“简单人模型”提供了电离过程的定性准确描述。在这里，我们提出了由简单人模型给出的物理图像的量子概括。我们描述了Heisenberg算子在激光场中的运动方程的近似解。我们提供了这种概括的理由，并通过将其应用于计算坐标和速度自相关函数来测试其有效性。