论文标题
使用有效的库仑电位在强驱动原子中三个或更多电子电离的通用模型和工具包，用于绑定电子之间的相互作用
A general model and toolkit for the ionization of three or more electrons in strongly driven atoms using an effective Coulomb potential for the interaction between bound electrons
论文作者
论文摘要
我们制定了三维半古典模型，以解决由强烈红外激光脉冲驱动的三电子原子中的三重和双电离。在时间传播期间，我们的模型完全解释了库仑奇异性，激光脉冲的磁场以及核与三个电子运动同时运动。我们开发的框架是一般的，可以说明具有三个以上电子的强驱动原子中的多电子电离。为了避免在三个或更多电子的经典模型中产生的非物理自动化，我们取代具有有效库仑电势的成对绑定电子之间的库仑电势。完全解释了不绑定的电子之间的库仑力。我们制定了一组标准，以确定在时间传播期间电子何时绑定。我们将在此处开发的模型和海森堡模型中获得的电离光谱进行比较，该模型包括一个潜在的术语，该术语限制了电子紧密接近核心。这样的光谱包括沿激光场方向以及相关的电子力量的总和。我们还将这些结果与实验结果进行了比较。
We formulate a three-dimensional semi-classical model to address triple and double ionization in three-electron atoms driven by intense infrared laser pulses. During time propagation, our model fully accounts for the Coulomb singularities, the magnetic field of the laser pulse and for the motion of the nucleus at the same time as for the motion of the three electrons. The framework we develop is general and can account for multi-electron ionization in strongly-driven atoms with more than three electrons. To avoid unphysical autoionization arising in classical models of three or more electrons, we replace the Coulomb potential between pairs of bound electrons with effective Coulomb potentials. The Coulomb forces between electrons that are not both bound are fully accounted for. We develop a set of criteria to determine when electrons become bound during time propagation. We compare ionization spectra obtained with the model developed here and with the Heisenberg model that includes a potential term restricting an electron from closely approaching the core. Such spectra include the sum of the electron momenta along the direction of the laser field as well as the correlated electron momenta. We also compare these results with experimental ones.
