## Regular and chaotic oscillations of Bose-Einstein condensates with long-range attractive interactions

- Torsten Schwidder
- 2009

Exceptional points are a special type of degeneracy which can appear for the resonances of parameter-dependent quantum spectra described by non-Hermitian Hamiltonians. They represent positions in the parameter space at which two or even more resonances pass through a branch point singularity. At the critical parameter values, the energies, the widths, and… (More)

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