[19a-A25-1~10] 3.5 Ultrashort-pulse and high-intensity lasers

10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)

[19a-A25-5] First principles simulation of multielectron systems under intense laser field using quantum computer and natural-expansion ansatz II

〇Hiroki Gi¹, Kenichi Ishikawa¹, Yukio Kawashima², Tanvi Gujarati², Takeshi Sato¹ (1.The Univ. of Tokyo, 2.IBM Quantum)

Keywords:

quantum computer,first-principle simulation,high harmonic generation

To calculate high-order harmonic generation, it is necessary to perform electron dynamics calculations. Our laboratory developed the TD-OUCC method using a quantum computer. However, when the number of orbitals is increased in the TD-OUCC method, the circuit length becomes too deep, and the noise effect prevents us from obtaining useful results. Therefore, we developed the Natural-expansion ansatz, and in this research, we conducted simulations of multi-electron atoms based on real three-dimensional Hamiltonians.