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arXiv 1310.3071physics.atom-phphysics.comp-phquant-ph
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内电子对原子强场电离动力学的影响

Effects of inner electrons on atomic strong-field ionization dynamics

J. Rapp, D. Bauer

摘要:

在通常认为内电子动力学可以忽略的波长范围内,研究了强激光场中内电子对电离动力学的影响。内电子的作用对于含时密度泛函理论(TDDFT)中的冻结核近似和赝势以及强场激光物理中的单激活电子(SAE)近似的应用特别感兴趣。将TDDFT和SAE的计算结果与锂模型原子三电子含时薛定谔方程的从头算数值解的精确结果进行了比较。发现动态反屏蔽,即,一种特殊形式的动态核心极化可以实质上改变单光子状态下的电离速率。在单光子和多光子电离域的近似的有效性的要求被确定。

英文摘要:

The influence of inner electrons on the ionization dynamics in strong laser fields is investigated in a wavelength regime where the inner electron dynamics is usually assumed to be negligible. The role of inner electrons is of particular interest for the application of frozen-core approximations and pseudopotentials in time-dependent density functional theory (TDDFT) and the single-active-electron (SAE) approximation in strong-field laser physics. Results of TDDFT and SAE calculations are compared with exact ones obtained by the numerical ab initio solution of the three-electron time-dependent Schrödinger equation for a lithium model atom. It is found that dynamical anti-screening, i.e., a particular form of dynamical core polarization, may substantially alter the ionization rate in the single-photon regime. Requirements for the validity of the approximations in the single and multiphoton ionization domain are identified.

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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