Affiliation:
1. Harbin Institute of Technology
2. National Applied Mathematical Center(Jilin)
3. Jilin University
4. Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy (Jilin University)
5. Taizhou University
Abstract
High-order harmonic generation (HHG) from the interaction of ultra-intense laser pulses with atoms is an important tabletop short-wave coherent light source. Accurate quantum simulations of it present large computational difficulties due to multi-electron multidimensional effects. In this paper, the time-dependent response of hydrogen atoms is calculated using a time-series prediction scheme, the HHG spectrum is reconstructed very accurately. The accuracy of the forecasting is further improved by using a neural network scheme. This scheme is also applied to the simulation of the harmonic emission on multi-electron systems, and the applicability of the scheme is confirmed by the harmonic calculation of complex systems. This method is expected to simulate the nonlinear dynamic process of multi-electron atoms and molecules irradiated by intense laser pulses quickly and accurately.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
Outstanding Youth Project of Taizhou University
Jilin Provincial Research Foundation for Basic Research, China
Subject
Atomic and Molecular Physics, and Optics