arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1503.00343physics.atom-ph
收藏

强场电离的广义程函近似

Generalized eikonal approximation for strong-field ionization

F. Cajiao Vélez, K. Krajewska, J. Z. Kamiński

摘要:

本文发展了描述强场电离的程函微扰理论。这种关于结合势的一阶方法(所谓的广义程函近似)避免了势中心的奇异性。因此,与普通的程函近似相反,它允许根据量子轨迹来处理再散射现象。我们展示了如何第一玻恩近似和它的有效域遵循程函微扰理论。利用这种方法,我们研究了光电子能谱中的相干衍射花样以及光电子与原子势相互作用引起的衍射花样的变化。随着这些第一个结果,我们讨论了使用广义程函近似研究强场电离多中心原子系统和研究其他强场现象的前景。

英文摘要:

We develop the eikonal perturbation theory to describe the strong-field ionization by finite laser pulses. This approach in the first order with respect to the binding potential (the so-called generalized eikonal approximation) avoids a singularity at the potential center. Thus, in contrast to the ordinary eikonal approximation, it allows to treat rescattering phenomena in terms of quantum trajectories. We demonstrate how the first Born approximation and its domain of validity follow from eikonal perturbation theory. Using this approach, we study the coherent diffraction patterns in photoelectron energy spectra and their modifications induced by the interaction of photoelectrons with the atomic potential. Along with these first results, we discuss the prospects of using the generalized eikonal approximation to study strong-field ionization from multi-centered atomic systems and to study other strong-field phenomena.

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。

↑