Prof. Ingrid Rotter

Research Interests

Description of small open quantum systems on the basis of an exact theory with a non-hermitian Hamilton operator


  • spectroscopic studies on light nuclei
  • laser induced continuum structures in atoms
  • transmission in quantum billiards


Dynamics of small quantum systems

In particular:

  • resonance trapping in the overlapping regime
  • relation to exceptional points in the complex energy plane
  • study of the avoided crossing scenario of discrete and narrow resonance states
  • phase rigidity of the scattering wave function
  • bound states in the continuum
  • width bifurcation at high level density


 Topology of branch points in the complex energy plane