原子系统中的集体隧穿电离
Collective tunnel ionization in atomic systems
浏览论文内容
中文总结 AI 辅助
该研究提出原子系统在强低频激光场下集体隧穿效应的理论，通过半经典方法和数值解证实中性氙、负溴离子的非序列双电离集体通道，提出用短圆偏振激光脉冲探测该效应的实验方案。
中文摘要 AI 辅助
我们提出了一种关于受强低频激光场作用的原子系统中集体隧穿效应的理论。采用解析半经典方法和含时薛定谔方程的数值解，我们在中性氙（Xe）和负溴离子（Br⁻）中证实了非序列双电离的集体通道。电子-电子排斥作用下的集体隧穿包含两个电子沿量子轨迹的联合亚势垒运动，这些轨迹相对于外电场方向横向反向偏移。电子对的动量分布在垂直于场偏振的方向上呈现出肩状结构，这是集体通道的明确特征。我们提出并讨论了使用短圆偏振激光脉冲在原子系统中探测集体隧穿的潜在实验方案。
英文摘要
We present a theory of the collective tunnel effect in atomic systems subject to strong low-frequency laser fields. Using an analytic semi-classical method and numerical solution to the time-dependent Schrodinger equation we demonstrate the collective channel of the nonsequential double ionization in neutral xenon and in the negative bromine ion. Collective tunneling in the presence of the electron-electron repulsion comprises the joint sub-barrier motion of the two electrons along quantum trajectories transversely shifted in opposite directions with respect to the direction of the external electric field. Momentum distributions of the electron pairs carry clear signatures of the collective channel in the form of shoulders in the direction lateral to the field polarization. We propose and discuss potential experimental approaches to a search for collective tunneling in atomic systems using short circularly polarized laser pulses.
