Gauge invariance beyond the electric dipole approximation

被引：12

作者：

Anzaki, Ryoji ^{[1
]}

Shinohara, Yasushi ^{[2
]}

Sato, Takeshi ^{[1
,2
,3
]}

Ishikawa, Kenichi L. ^{[1
,2
,3
]}

机构：

[1] Univ Tokyo, Grad Sch Engn, Dept Nucl Engn & Management, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan

[2] Univ Tokyo, Grad Sch Engn, Photon Sci Ctr, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan

[3] Univ Tokyo, Res Inst Photon Sci & Laser Technol, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan

来源：

PHYSICAL REVIEW A | 2018年 / 98卷 / 06期

基金：

日本科学技术振兴机构;

关键词：

MOLECULES; DYNAMICS;

D O I：

10.1103/PhysRevA.98.063410

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the gauge invariance of the laser-matter interaction. The velocity gauge, where the vector potential is expanded to the nth order with respect to the spatial coordinate, and the length gauge, where the electric and magnetic fields are expanded to the nth and (n - 1)th orders, respectively, are mutually gauge transformed, describing the physically equivalent situation. The latter includes up to the electric 2(n+1)-pole and magnetic 2(n)-pole interactions as well as two extra terms. The finding serves to develop consistent nonperturbative simulation methods beyond the electric dipole approximation.

引用

页数：8

共 48 条

[1] Perspective: Quantum Hamiltonians for optical interactions [J].