18 citations · 26 across the 4 of their papers we have counts for
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Uniform semiclassical approximations on a topologically non-trivial configuration space: The hydrogen atom in an electric field
T. Bartsch, J. Main, G. Wunner
Semiclassical periodic-orbit theory and closed-orbit theory represent a quantum spectrum as a superposition of contributions from individual classical orbits. Close to a bifurcatio…
Semiclassical quantization of the hydrogen atom in crossed electric and magnetic fields
T. Bartsch, J. Main, G. Wunner
The S-matrix theory formulation of closed-orbit theory recently proposed by Granger and Greene is extended to atoms in crossed electric and magnetic fields. We then present a semic…
Semiclassical Quantization by Harmonic Inversion: Comparison of Algorithms
T. Bartsch, J. Main, G. Wunner
Harmonic inversion techniques have been shown to be a powerful tool for the semiclassical quantization and analysis of quantum spectra of both classically integrable and chaotic dy…
Ghost orbit bifurcations in semiclassical spectra
T. Bartsch, J. Main, G. Wunner
Gutzwiller's semiclassical trace formula for the density of states in a chaotic system diverges near bifurcations of periodic orbits, where it must be replaced with uniform approxi…