Department of Physics and Astronomy: Publications and Other Research
Date of this Version
July 1988
Abstract
Well-known variational principles for second-order perturbation matrix elements are extended to higher-order multiphoton processes for atomic hydrogen. Numerical applications to two- and three-photon ionization of the hydrogen ground state provide results comparable to those of analytic calculations, even near intermedaite-state resonances, yet without the complications involved in summation over intermediate states. Extensions to multiphoton processes for many-electron atoms are discussed briefly.
Comments
Published by American Physical Society. Phys. Rev. Lett. 61, 404 (1988). http://prl.aps.org. Copyright © 1988 American Physical Society. Permission to use.