Phys. Rev. Lett. 94, 113001 (2005) [4 pages]Emergence of Classical Orbits in Few-Cycle Above-Threshold Ionization of Atomic HydrogenReceived 3 January 2005; published 22 March 2005 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. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.113001
DOI:
10.1103/PhysRevLett.94.113001
PACS:
32.80.Rm, 02.60.Cb, 34.50.Rk, 42.50.Hz
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