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Visualization and interpretation of attosecond electron dynamics in laser-driven hydrogen molecular ion using Bohmian trajectories

机译:激光驱动氢分子离子中的玻秒轨迹可视化和解释阿秒电子动力学

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摘要

We analyze the attosecond electron dynamics in hydrogen molecular ion driven by an external intense laser field using the Bohmian trajectories. To this end, we employ a one-dimensional model of the molecular ion in which the motion of the protons is frozen. The Bohmian trajectories clearly visualize the electron transfer between the two protons in the field and, in particular, confirm the recently predicted attosecond transient localization of the electron at one of the protons and the related multiple bunches of the ionization current within a half cycle of the laser field. Further analysis based on the quantum trajectories shows that the electron dynamics in the molecular ion can be understood via the phase difference accumulated between the Coulomb wells at the two protons.
机译:我们使用鲍姆轨道分析由外部强激光场驱动的氢分子离子中的阿秒电子动力学。为此,我们采用了分子离子的一维模型,其中质子的运动被冻结了。玻姆氏轨迹清楚地显示了场中两个质子之间的电子转移,特别是确认了最近预测的电子在质子之一处的亚秒级瞬态局域化以及相关的半束电离电流。激光场。基于量子轨迹的进一步分析表明,可以通过两个质子在库仑阱之间积累的相位差来理解分子离子中的电子动力学。

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