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Bose-Einstein condensates with balanced gain and loss beyond mean-field theory
Dennis Dast, Daniel Haag, Holger Cartarius +2
Most of the work done in the field of Bose-Einstein condensates with balanced gain and loss has been performed in the mean-field approximation using the PT-symmetric Gross-Pitaevsk…
Bifurcations and exceptional points in a PT-symmetric dipolar Bose-Einstein condensate
Robin Gutöhrlein, Holger Cartarius, Jörg Main +1
We investigate the bifurcation structure of stationary states in a dipolar Bose-Einstein condensate located in an external PT-symmetric potential. The imaginary part of this extern…
Rydberg systems in parallel electric and magnetic fields: an improved method for finding exceptional points
Matthias Feldmaier, Jörg Main, Frank Schweiner +2
Exceptional points are special parameter points in spectra of open quantum systems, at which resonance energies degenerate and the associated eigenvectors coalesce. Typical example…