Numerical simulations of strong-field processes in momentum space

doi:10.1088/1674-1056/ab6553

Abstract The time-dependent Schrödinger equation (TDSE) is usually treated in the real space in the textbook. However, it makes the numerical simulations of strong-field processes difficult due to the wide dispersion and fast oscillation of the electron wave packets under the interaction of intense laser fields. Here we demonstrate that the TDSE can be efficiently solved in the momentum space. The high-order harmonic generation and above-threshold ionization spectra obtained by numerical solutions of TDSE in momentum space agree well with previous studies in real space, but significantly reducing the computation cost.

Keywords: high-order harmonic generation above-threshold ionization numerical method

Received: 07 November 2019
Revised: 30 November 2019
Accepted manuscript online:

PACS:	32.80.Rm	(Multiphoton ionization and excitation to highly excited states)
	42.65.Ky	(Frequency conversion; harmonic generation, including higher-order harmonic generation)
	42.65.Re	(Ultrafast processes; optical pulse generation and pulse compression)

Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2019YFA0307702), the National Natural Science Foundation of China (Grants Nos. 91850121 and 11674363), the Science Fund of Educational Department of Henan Province of China (Grant No. 2011C140001), and the Ninth Group of Key Disciplines in Henan Province, China (Grant No. 2018119).

Corresponding Authors: Xue-Bin Bian
E-mail: xuebin.bian@wipm.ac.cn

Cite this article:

Yan Xu(徐彦), Xue-Bin Bian(卞学滨) Numerical simulations of strong-field processes in momentum space 2020 Chin. Phys. B 29 023202

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