[en] We provide a detailed quantum treatment of the spectral characteristics and of the dynamics of nondispersive two-electron wave packets along the periodically driven, collinear frozen planet configuration of helium. These highly correlated, long-lived wave packets arise as a quantum manifestation of regular islands in a mixed classical phase space, which are induced by nonlinear resonances between the external driving and the unperturbed dynamics of the frozen-planet configuration. Particular emphasis is given to the dependence of the ionization rates of the wave packet states on the driving field parameters and on the quantum mechanical phase space resolution, preceded by a comparison of 1D and 3D life times of the unperturbed frozen planet. Furthermore, we study the effect of a superimposed static electric field component, which, on the grounds of classical considerations, is expected to stabilize the real 3D dynamics against large (and possibly ionizing) deviations from collinearity.
Disciplines :
Physics
Author, co-author :
Schlagheck, Peter ; Université de Liège - ULiège > Département de physique > Physique quantique statistique
Buchleitner, A.
Language :
English
Title :
Nondispersive two-electron wave packets in driven helium
Publication date :
2003
Journal title :
European Physical Journal D. Atoms, Molecules, Clusters and Optical Physics
ISSN :
1434-6060
eISSN :
1434-6079
Publisher :
Springer Science & Business Media B.V., New York, United States - New York