Resonance-enhanced two-photon ionization of hydrogen atom in intense laser field investigated by Bohmian-mechanics

• 作者: Fu-Ming Guo Shu Han Su-Yu Li Yang Song Yu-Jun Yang
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2020,（9）
• 所属期刊栏目: ATOMIC AND MOLECULAR PHYSICS
• 页码范围: 320-327
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1056/aba09e

摘要

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 energy of the system.In addition,it is proved that the quantum potential energy actually comes from the kinetic energy of the system and the increment of kinetic energy is equal to that of the kinetic energy of the system.

作者信息

序号	姓名	单位	发文数	被引次数	H指数	G指数
1	Yang Song		1	0	0.0	0.0
2	Shu Han		1	0	0.0	0.0
3	Yu-Jun Yang		1	0	0.0	0.0
4	Fu-Ming Guo		2	0	0.0	0.0
5	Su-Yu Li		1	0	0.0	0.0