Open AccessGauge-invariant time-dependent configuration interaction singles method: applications to high-harmonic generation from atoms
Author(s) -
Takuma Teramura,
Takeshi Sato,
Kenichi L. Ishikawa
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1412/8/082003
Subject(s) - gauge (firearms) , physics , hamiltonian lattice gauge theory , gauge theory , invariant (physics) , gauge anomaly , introduction to gauge theory , supersymmetric gauge theory , mathematical descriptions of the electromagnetic field , quantum gauge theory , classical mechanics , gauge fixing , gauge boson , quantum electrodynamics , theoretical physics , quantum mechanics , archaeology , history
Synopsis We present gauge-invariant reformulation of time-dependent configuration interaction singles (TDCIS) method and its applications to high-harmonic generation (HHG) from three-dimensional atoms. The conventional TDCIS method suffers from a violation of gauge-invariance, which prevents efficient simulations of high-field phenomena within the velocity gauge. In our reformulation, rotated velocity gauge transformed from the length gauge is employed instead of the velocity gauge. We simulate HHG from atoms and show gauge-invariance and performance of our rotated velocity gauge.