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4 papers · 2 filters
Residual Symmetries in the Spectrum of Periodically Driven Alkali Rydberg States
Andreas Krug, Andreas Buchleitner
We identify a fundamental structure in the spectrum of microwave driven alkali Rydberg states, which highlights the remnants of the Coulomb symmetry in the presence of a non-hydrog…
Existence criteria for stabilization from the scaling behaviour of ionization probabilities
C. Figueira de Morisson Faria, A. Fring, R. Schrader
We provide a systematic derivation of the scaling behaviour of various quantities and establish in particular the scale invariance of the ionization probability. We discuss the gau…
Universal shape function for the double ionization cross section of negative ions by electron impact
Jan M Rost, Thomas Pattard
It is shown that recently measured cross sections for double ionization of negative ions (, and ) possess a universal shape when plotted in suitable dimensionless un…
Irregular orbits generate higher harmonics
Gerd van de Sand, Jan M Rost
The spectrum of higher harmonics in atoms calculated with a uniformized semiclassical propagator is presented and it is shown that higher harmonic generation is an interference phe…