Exceptional Points in Atomic Spectra
arXiv:nlin/0703023 · doi:10.1103/PhysRevLett.99.173003
Abstract
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.
4 pages, 4 figures, 1 table, to be published in Physical Review Letters