Analysis of strong-field enhanced ionization of molecules using Bohmian trajectories (2014)
We theoretically investigate the mechanism of enhanced ionization in two-electron molecules by analyzing Bohmian trajectories for a one-dimensional hydrogen molecule in an intense laser field. We identify both types of ionizing trajectories corresponding to the ejection from the up-field and down-field cores. The electronic correlation plays an important role in the former while it is negligible in the latter. The contributions from the two ionization types, though depending on laser intensity and internuclear distance, are comparable to each other, contrary to what is commonly believed.
R. Sawada, T. Sato, and K. L. Ishikawa, Analysis of strong-field enhanced ionization of molecules using Bohmian trajectories, Phys. Rev. A 90, 023404-1-8 (8 pages) (2014). (http://dx.doi.org/10.1103/PhysRevA.90.023404)