Semi-classical Methods in Non-Sequential Double Ionization

Allan S. Johnson ； André Staudte ； D. M. Villeneuve

《Chinese Journal of Physics》 52卷1期PartII (2014/02) Pp. 329-339

https://doi.org/10.6122/CJP.52.329

並列摘要

Non-sequential double ionization of an atom in an intense laser field is a prototypical problem in multi-body strong field interactions. To examine non-sequential double ionization, an often used approach is the semi-classical method, by which initial conditions are set according to quantum expressions and the ensuing dynamics modelled classically. Here we present a comparative study of quantum and semi-classical methods in the single active electron approximation. We show that semi-classical methods over-estimate the kinetic energy of rescattered electrons by up to 150%. We further show that the return time of the recolliding electrons deviates between quantum and semi-classical methods at low intensities, and that the deviation is attributable to the choice of the initial tunnelling position.

參考文獻

P. B. Corkum and F. Krausz, Nature Physics 3, 381 (2007).

F. Krausz and M. Ivanov, Reviews of Modern Physics 81, 163 (2009).

P. B. Corkum, Physical Review Letters 71, 1994 (1994).

C. F. de Morisson Faria and X. Liu, Journal of Modern Optics 58, 1076 (2011).

S. Larochelle, A. Talebpour, and S. L. Chin, Journal of Physics B: Atomic, Molecular and Optical Physics 31, 1201 (1998).