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Attosecond-resolution quantum dynamics calculations for atoms and molecules in strong laser fields

2008; American Physical Society; Volume: 77; Issue: 6 Linguagem: Inglês

10.1103/physreve.77.066701

1550-2376

Ruifeng Lu, Peiyu Zhang, Keli Han,

Mass Spectrometry Techniques and Applications

A parallel quantum electron and nuclei wave packet computer code, LZH-DICP, has been developed to study laser-atom-molecule interaction in the nonperturbative regime with attosecond resolution. The nonlinear phenomena occurring in that regime can be studied with the code in a rigorous way by numerically solving the time-dependent Schrödinger equation of electrons and nuclei. Time propagation of the wave functions is performed using a split-operator approach, and based on a sine discrete variable representation. Photoelectron spectra for hydrogen and kinetic-energy spectra for molecular hydrogen ion in linearly polarized laser fields are calculated using a flux operator scheme, which testifies to the validity and the high efficiency of LZH-DICP.