Prof. Ingrid Rotter

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

Examples:

• 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