title: Emergence of classical orbits in few-cycle above-threshold ionization of atomic hydrogen.
abstract: The time-dependent Schrödinger equation for atomic hydrogen in few-cycle laser pulses is solved numerically. Introducing a positive definite quantum distribution function in energy-position space, a straightforward comparison of the numerical ab initio results with classical orbit theory is facilitated. Integration over position space yields directly the photoelectron spectra so that the various pathways contributing to a certain energy in the photoelectron spectra can be established in an unprecedented direct and transparent way.
authors.affiliation: Max-Planck-Institut für Kernphysik, Postfach 103980, 69029 Heidelberg, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Bauer