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arXiv 2601.05830physics.atom-ph
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解析能量分辨阿托钟机制

Identifying Mechanism of Energy-Resolved Attoclock

College of Physics and Information Technology and Quantum Materials and Devices Key Laboratory of Shaanxi Province’s High Education Institution, Shaan’xi Normal University（陕西师范大学物理与信息工程学院、陕西省高校量子材料与器件重点实验室）；College of Physics, Henan Normal University（河南师范大学物理学院）；College of Physics and Hebei Key Laboratory of Photophysics Research and Application, Physics Postdoctoral Research Station, Hebei Normal University（河北师范大学物理学院、河北省光物理研究与应用重点实验室、物理学博士后科研流动站）；Hebei Key Laboratory of Optoelectronic Information and Geo-detection Technology, School of Mathematics and Science, Hebei GEO University（河北地质大学数理学院、河北省光电信息与地质探测技术重点实验室）；School of Physics, Northwest University（西北大学物理学院）

Jia'nan Wu, Shiqi Shen, Jiayin Che, Shang Wang, Weiyan Li, Guoguo Xin, Yanjun Chen

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5 pages, 3figures
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AI总结：

本文通过解析强场模型揭示了非绝热效应如何影响阿托钟偏移角，并展示了库仑效应如何使角度随能量平滑增加。

摘要：

我们通过数值和解析方法研究强椭圆激光场中原子的超阈值电离（ATI）现象。最近对氢原子的基准实验表明，与每个ATI环相关的阿托钟偏移角随着能量显著增加，这一特征现象可归因于激光诱导的非绝热电子在隧道出口的初始速度和位置[PRL127, 273201 (2021)]。然而，非绝热效应如何影响该角度的具体机制仍不清楚。本文通过一个强场模型，该模型能够解析且定量地分离复杂的非绝热效应和库仑效应，从而明确识别详细机制。我们显示，由于非绝热效应，与较低（较高）能量环相关的角度主要由激光椭圆的主要（次要）轴主导，从0°跳变到90°。这些与场相关的刚性效应被库仑诱导的退出速度所软化，该速度与系统对称性密切相关，导致角度随能量显著但平滑地增加。

英文摘要：

We study above-threshold ionization (ATI) of atoms in strong elliptical laser fields numerically and analytically. Recent benchmark experiments for H showed that the attoclock offset angle related to each ATI ring increases remarkably with energy and this characteristic phenomenon can be attributed to the laser-induced nonadiabatic initial velocity and position of the electron at the tunnel exit [PRL127, 273201 (2021)]. However, the specific mechanism of how the nonadiabatic effects influence this angle remains unclear. Here, by using a strong-field model that analytically and quantitatively decouples complex nonadiabatic effects and Coulomb effects, the detailed mechanism can be clearly identified. We show that due to nonadiabatic effects, the angles associated with lower (higher) energy rings are dominated by the main (minor) axis of the laser ellipse, jumping from $0^o$ to $90^o$. These field-related rigid effects are softened by Coulomb-induced exit velocity closely related to system symmetry, resulting in a significant but smooth increase in angle with energy.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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