Double ionization of helium studied with the multi-configuration time-dependent Hartree–Fock method

Abstract

The intensity dependence of double ionization probability of helium in a strong laser field is investigated by using the multi-configuration time-dependent Hartree–Fock (MCTDHF) method. The results agree with the previous theoretical report by directly solving the time-dependent Schrödinger equation. The time evolution of electronic population on the ground state, electronic energy and dipole moment are also presented and discussed.

Acknowledgements

We are indebted to Professor A. Scrinzi many helpful discussions, and we thank Dr R. Nepstad for providing his theoretical results for comparison.