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arXiv 2103.14447physics.atom-ph
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阿秒光电发射延迟中的势、交换和关联

Potentials, exchange, and correlation in attosecond photoemission delays

Hakon Volkmann, Vinay P. Majety, Armin Scrinzi

摘要:

我们调查阿秒的时间延迟发射的光电子使用的层次模型的$CO_2$分子,包括强场近似,库仑散射,短程部分的分子势,Hartree和Hartree-Fock的描述。此外,我们提出了一个{ \it ab initio}计算的基础上的量子化学结构结合强场技术,其中充分包括多电子交换和相关。每一个单一的这些模型成分被发现修改延迟的规模为10或更多,与交流和相关性具有最显着的效果。

英文摘要:

We investigate attosecond time delays in the emission of photoelectrons using a hierarchy of models of the $CO_2$ molecule including the strong field approximation, Coulomb-scattering, short-range parts of the molecular potential, Hartree and Hartree-Fock descriptions. In addition, we present an {\it ab initio} calculation based on quantum-chemical structure in combination with strong-field techniques, which fully includes multi-electron exchange and correlation. Every single of these model constituents is found to modify delays on the scale of 10 as or more, with exchange and correlation having the most pronounced effect.

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