SOLUTION OF THE INITIAL-VALUE PROBLEM IN LASER ATOM INTERACTION - A VARIATIONAL FOURIER-TRANSFORM METHOD
Faisal, Farhard
SCANZANO, P
In this paper a generalized Fourier transform method for solving the initial-value problem associated with the interaction of an atom with a semiclassical laser field is presented. The method is combined with a variational technique of expanding the atomic potential. The energy-transform of the total wavefunction is obtained algebraically, while the wavefunction itself, at a time t, is given as a quadrature over the explicit algebraic expressions. Furthermore, the method permits one to determine the long-time limit t --> + infinity without the quadrature. Analytic expressions of the ATI transition amplitudes are given. As an illustration of the use of the method, we apply it to the problem of determining the above-threshold-detachment (ATD) spectra of a 3D model of H-. Results of computations for (a) the stationary ATD spectra, (b) the perturbed energies of the initial bound state, (c) the total rate of detachment and (d) the ATD spectra for individual photon absorption channels are presented for a range of intensities.
ELSEVIER SCIENCE BV
1991
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1650149
Faisal F, SCANZANO P. SOLUTION OF THE INITIAL-VALUE PROBLEM IN LASER ATOM INTERACTION - A VARIATIONAL FOURIER-TRANSFORM METHOD. <em>COMPUTER PHYSICS COMMUNICATIONS</em>. 1991;63(1-3):265-278.
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/0010-4655(91)90255-J
info:eu-repo/semantics/altIdentifier/issn/0010-4655
info:eu-repo/semantics/altIdentifier/wos/A1991FF11000025
info:eu-repo/semantics/closedAccess