Exceptional points in atomic spectra

We report the existence of exceptional points for the hydrogen atom in crossed magnetic and electric fields in numerical calculations. The resonances of the system are investigated and it is shown how exceptional points can be found by exploiting characteristic properties of the degeneracies, which...

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Bibliographic Details
Published in:Physical review letters 2007-10, Vol.99 (17), p.173003-173003, Article 173003
Main Authors: Cartarius, Holger, Main, Jörg, Wunner, Günter
Format: Article
Language:English
Subjects:
ATOMS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
ELECTRIC FIELDS
HYDROGEN
RESONANCE
SINGULARITY
SPECTRA
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Summary:We report the existence of exceptional points for the hydrogen atom in crossed magnetic and electric fields in numerical calculations. The resonances of the system are investigated and it is shown how exceptional points can be found by exploiting characteristic properties of the degeneracies, which are branch point singularities. A possibility for the observation of exceptional points in an experiment with atoms is proposed.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.99.173003