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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:30 |
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Conference: Bucharest University Faculty of Physics 2004 Meeting
Section: Statistical Physics and Quantum Mechanics Seminar
Title:
The One-Dimensional Soft-Core Model Atom in a Superintense Low-Frequency Laser Field
Authors:
M. Stroe(1), I. Simbotin(2), M. Gavrila(3)
Affiliation:
1 Department of Chemistry, University of Bucharest, Bucharest
2 Department of Physics, University of Connecticut, Storrs
3 FOM Institute for Atomic and Molecular Physics, Amsterdam
E-mail
stroe@barutu.fizica.unibuc.ro
Keywords:
Floquet theory,cuasistationary stabilization, atomic dichotomy
Abstract:
Using a 1D model of a soft-core Coulomb potential, we show numerically that the cuasistationary stabilization (QS) and atomic dichotomy, considered as high frequency concepts, are also applied at low frequencies, on condition that the intensity is sufficiently high.
We have obtained in the HI-HFFT framework the quasienergies for the low frequency case in an extended range of field intensity.
The exact results for the cuasienergies are in good agreement with the predictions of HI-HFFT. The total ionization rate tends to zero (in a oscillatory manner) displaying QS. Atomic dichotomy is illustrated by analysing the behaviour of the components of the Floquet solutions. We present the changes of the structure of the Floquet components at the increasing of field intensity at fixed frequency, emphasizing the role of the avoided crossings (AvCr) in the process.
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