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Updated: Jun 4, 2026

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
Published on: August 6, 2018
Two-photon ionization of helium studied with the multiconfigurational time-dependent Hartree-Fock method
David Hochstuhl1, Michael Bonitz
1Institut für Theoretische Physik und Astrophysik, Kiel, Germany. hochstuhl@theo-physik.uni-kiel.de
Abstract:
The multiconfigurational time-dependent Hartree-Fock method (MCTDHF) is applied for simulations of the two-photon ionization of helium. We present results for the single and double ionizations from the ground state for photon energies in the nonsequential regime and compare them to direct solutions of the Schrödinger equation using the time-dependent (full) configuration interaction (TDCI) method. We find that the single ionization is accurately reproduced by MCTDHF, whereas the double ionization results correctly capture the main trends of TDCI.
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