Generalized gauge-invariant formulations of the strong-field approximation

被引：17

作者：

Vanne, Yulian V. ^{[1
]}

Saenz, Alejandro ^{[1
]}

机构：

[1] Humboldt Univ, Inst Phys, AG Moderne Opt, D-10117 Berlin, Germany

来源：

PHYSICAL REVIEW A | 2009年 / 79卷 / 02期

关键词：

atom-photon collisions; molecule-photon collisions; S-matrix theory; IONIZATION;

D O I：

10.1103/PhysRevA.79.023421

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The gauge problem in the so-called strong-field approximation (SFA) describing atomic or molecular systems exposed to intense laser fields is investigated. By introducing a generalized gauge and partitioning of the Hamiltonian, it is demonstrated that the S-matrix expansion obtained in the SFA depends on both gauge and partitioning in such a way that two gauges always yield the same S-matrix expansion, if the partitioning is properly chosen.

引用

页数：7

共 20 条

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