Doublets and Accidental Degeneracy of Resonances

  • E. Hernández
  • A. Jáuregui
  • A. Mondragón
Conference paper
Part of the Few Body Systems book series (FEWBODY, volume 13)


By means of two simple examples, we show that degeneracy of two resonances and the concomitant occurrence of a complex double pole in the S-matrix of a quantum system may be contrived by adjusting the control parameters of the system.


Resonant State Double Pole Berry Phase Unbind State Energy Hypersurface 
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Copyright information

© Springer-Verlag 2001

Authors and Affiliations

  • E. Hernández
    • 1
  • A. Jáuregui
    • 2
  • A. Mondragón
    • 1
  1. 1.Instituto de FísicaUNAMMéxico D.F.México
  2. 2.Departamento de FísicaUniversidad de SonoraHermosillo, SonoraMéxico

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