A discrete time-dependent method for metastable atoms and molecules in intense fields |
| |
Authors: | Peng Liang-You McCann J F Dundas Daniel Taylor K T Williams I D |
| |
Affiliation: | International Research Centre for Experimental Physics and School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, Northern Ireland, United Kingdom. |
| |
Abstract: | The full-dimensional time-dependent Schr?dinger equation for the electronic dynamics of single-electron systems in intense external fields is solved directly using a discrete method. Our approach combines the finite-difference and Lagrange mesh methods. The method is applied to calculate the quasienergies and ionization probabilities of atomic and molecular systems in intense static and dynamic electric fields. The gauge invariance and accuracy of the method is established. Applications to multiphoton ionization of positronium, the hydrogen atom and the hydrogen molecular ion are presented. At very high laser intensity, above the saturation threshold, we extend the method using a scaling technique to estimate the quasienergies of metastable states of the hydrogen molecular ion. The results are in good agreement with recent experiments. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|