Exceptional points in atomic spectra.

  title={Exceptional points in atomic spectra.},
  author={H. Cartarius and J. Main and G. Wunner},
  journal={Physical review letters},
  volume={99 17},
  • H. Cartarius, J. Main, G. Wunner
  • Published 2007
  • Physics, Medicine
  • Physical review letters
  • 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. 
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