[21a-211A-1~11] 3.6 Ultrashort-pulse and high-intensity lasers

[21a-211A-3] Implementation of gauge-invariant time-dependent configuration interaction singles (TDCIS) method to three-dimensional atom

〇(M2)Takuma Teramura¹, Takeshi Sato¹, Kenichi Ishikawa¹ (1.UTokyo)

Keywords:High-Harmonic Generation, First-principles simulation, Attosecond science

Time-dependent configuration interaction singles method is a promissing method to simulate multielectron dynamics under laser field. In the usual TDCIS method, we have to calculate many unoccupied orbitals. However, we can get rid of this by propagating quantity called channel orbiatal. Moreover, we can perform simulation in velocity gauge with gauge-invariance. In this research, we present the first implementation of the gauge-invariant TDCIS method to three-demensional atom.