Resonance enhanced two-photon ionization process of hydrogen atom via the resonant laser pulse is studied by Bohmian mechanics (BM) method. By analyzing the trajectories and energies of Bohmian particles (BPs), we find that under the action of high frequency and low intensity multi-circle resonant laser pulses, the ionized BPs first absorb one photon completing the excitation, and then absorb another photon, completing the ionization after staying in the first excited state for a period of time. The analysis of work done by the forces shows that the electric field force and quantum force play a major role in the whole ionization process. At the excitation moment and in the excitation-ionization process, the effect of the quantum force is greater than that of the electric field force. Finally, we discuss the principle of work and energy for BPs, and find that the electric field force and quantum force are non-conservative forces whose work is equal to the increment of mechanical ...

中文翻译：

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用波姆力学研究强激光场中氢原子的共振增强双光子电离

利用Bohmian力学（BM）方法研究了共振激光脉冲对氢原子的共振增强双光子电离过程。通过分析波曼粒子（BP）的轨迹和能量，我们发现在高频和低强度多圆共振激光脉冲的作用下，电离的BP首先吸收一个光子，完成激发，然后吸收另一个光子，完成停留在第一激发态一段时间后的电离。对力所做的功的分析表明，电场力和量子力在整个电离过程中起着重要作用。在激发时刻和在激发电离过程中，量子力的作用大于电场力的作用。最后，我们讨论了BP的工作原理和能源原理，