Spectral properties of Atoms in Fields: A Semiclassical Analysis

Details Spectral properties of Atoms in Fields: A Semiclassical Analysis Spectral properties of Atoms in Fields: A Semiclassical Analysis

1999-11-02

arxiv.org/abs/chao-dyn/9911008v1

Nonlinear Sciences

Chaotic Dynamics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevE.61.6444

We develop a semiclassical theory for the spectral rigidity of non-hydrogenic Rydberg atoms in electric fields and evaluate the significant deviations from the well-known Poissonian behaviour in the hydrogenic case. The resulting formula is shown to be in excellent agreement with the exact quantal result. We also investigate diamagnetic atoms; we find that, in contrast to the classically integrable atoms, diffraction has a small effect on the spectral rigidity in the classically chaotic atom. We show our predictions can also be of use in the mixed phase space regime.

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