Journal
PHYSICAL REVIEW LETTERS
Volume 105, Issue 25, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.253002
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Funding
- Deutsche Forschungsgemeinschaft [SFB 652]
- Russian Foundation for Basic Research
- International Max Planck Research School for Quantum Dynamics in Heidelberg
- Nederlandse organisatie voor Wetenschappelijk Onderzoek (NWO)
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Experiments on atoms in intense laser pulses and the corresponding exact ab initio solutions of the time-dependent Schrodinger equation (TDSE) yield photoelectron spectra with low-energy features that are not reproduced by the otherwise successful work horse of strong field laser physics: the strong field approximation'' (SFA). In the semiclassical limit, the SFA possesses an appealing interpretation in terms of interfering quantum trajectories. It is shown that a conceptually simple extension towards the inclusion of Coulomb effects yields very good agreement with exact TDSE results. Moreover, the Coulomb quantum orbits allow for a physically intuitive interpretation and detailed analysis of all low-energy features in the semiclassical regime, in particular, the recently discovered low-energy structure'' [C. I. Blaga et al., Nature Phys. 5, 335 (2009) and W. Quan et al., Phys. Rev. Lett. 103, 093001 (2009)].
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