Angular momentum distribution of atomic hydrogen in excited states under ultra-short laser field

doi:10.1088/1674-1056/adfdc6

中国物理B ›› 2026, Vol. 35 ›› Issue (3): 33201-033201.doi: 10.1088/1674-1056/adfdc6

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Angular momentum distribution of atomic hydrogen in excited states under ultra-short laser field

Zhaoyan Zhou(周兆妍)†, Dongwen Zhang(张栋文), and Zengxiu Zhao(赵增秀)

Department of Physics, College of Science, National University of Defense Technology, Changsha 410073, China

收稿日期:2025-06-10 修回日期:2025-08-10 接受日期:2025-08-21 发布日期:2026-02-11
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 12374241 and 12374263).

Angular momentum distribution of atomic hydrogen in excited states under ultra-short laser field

Zhaoyan Zhou(周兆妍)†, Dongwen Zhang(张栋文), and Zengxiu Zhao(赵增秀)

Department of Physics, College of Science, National University of Defense Technology, Changsha 410073, China

Received:2025-06-10 Revised:2025-08-10 Accepted:2025-08-21 Published:2026-02-11
Contact: Zhaoyan Zhou E-mail:cnzhzhy@nudt.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 12374241 and 12374263).

摘要/Abstract

摘要： We investigate the population distribution of excited angular momentum ($l$) states in the interaction between a hydrogen atom and an ultra-short laser pulse. Through numerical solution of the time-dependent Schrödinger equation, we theoretically investigate the laser-induced oscillations among excited $l$-states. Temporal evolution analysis reveals distinctive signatures of both multiphoton excitation and frustrated tunneling ionization processes. Specifically, multiphoton excitation dominates during the final optical cycle as the laser peak intensity attenuates, thereby critically determining the final $l$-states population distribution. We demonstrate that the angular quantum states' parity effect does not persist, even for ultra-short pulses with broad frequency bandwidths. The parity effect is also unaffected by laser field asymmetry.

关键词: ultra-short laser pulses, excited angular momentum states, time-dependent Schrödinger equation, parity effect

Abstract: We investigate the population distribution of excited angular momentum ($l$) states in the interaction between a hydrogen atom and an ultra-short laser pulse. Through numerical solution of the time-dependent Schrödinger equation, we theoretically investigate the laser-induced oscillations among excited $l$-states. Temporal evolution analysis reveals distinctive signatures of both multiphoton excitation and frustrated tunneling ionization processes. Specifically, multiphoton excitation dominates during the final optical cycle as the laser peak intensity attenuates, thereby critically determining the final $l$-states population distribution. We demonstrate that the angular quantum states' parity effect does not persist, even for ultra-short pulses with broad frequency bandwidths. The parity effect is also unaffected by laser field asymmetry.

Key words: ultra-short laser pulses, excited angular momentum states, time-dependent Schrödinger equation, parity effect

中图分类号: (Photoionization and excitation)

32.80.-t

32.80.Rm (Multiphoton ionization and excitation to highly excited states) 31.70.Hq (Time-dependent phenomena: excitation and relaxation processes, and reaction rates)

Zhaoyan Zhou(周兆妍)†, Dongwen Zhang(张栋文), and Zengxiu Zhao(赵增秀). Angular momentum distribution of atomic hydrogen in excited states under ultra-short laser field[J]. 中国物理B, 2026, 35(3): 33201-033201.

Zhaoyan Zhou(周兆妍)†, Dongwen Zhang(张栋文), and Zengxiu Zhao(赵增秀). Angular momentum distribution of atomic hydrogen in excited states under ultra-short laser field[J]. Chin. Phys. B, 2026, 35(3): 33201-033201.

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Angular momentum distribution of atomic hydrogen in excited states under ultra-short laser field

Angular momentum distribution of atomic hydrogen in excited states under ultra-short laser field

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