131 citations · 1.5k across the 69 of their papers we have counts for
6 papers · 2 filters
Tilted optical lattices with defects as realizations of PT symmetry in Bose-Einstein condensates
Manuel Kreibich, Jörg Main, Holger Cartarius +1
A PT-symmetric Bose-Einstein condensate can theoretically be described using a complex optical potential, however, the experimental realization of such an optical potential describ…
State Flip at Exceptional Points in Atomic Spectra
Henri Menke, Marcel Klett, Holger Cartarius +2
We study the behavior of the non-adiabatic population transfer between resonances at an exceptional point in the spectrum of the hydrogen atom. It is known that, when the exception…
-symmetric currents of a Bose-Einstein condensate in a triple well
Daniel Haag, Dennis Dast, Holger Cartarius +1
We study the case of -symmetric perturbations of Hermitian Hamiltonians with degenerate eigenvalues using the example of a triple-well system. The degeneracy complica…
Purity oscillations in Bose-Einstein condensates with balanced gain and loss
Dennis Dast, Daniel Haag, Holger Cartarius +1
In this work we present a new generic feature of PT-symmetric Bose-Einstein condensates by studying the many-particle description of a two-mode condensate with balanced gain and lo…
Fano resonances in scattering: an alternative perspective
Lukas Schwarz, Holger Cartarius, Günter Wunner +2
In a previous paper it has been shown that the interference of the first and second order pole of the Green's function at an exceptional point, as well as the interference of the f…
Cusp bifurcation in the eigenvalue spectrum of PT-symmetric Bose-Einstein condensates
Daniel Dizdarevic, Dennis Dast, Daniel Haag +3
A Bose-Einstein condensate in a double-well potential features stationary solutions even for attractive contact interaction as long as the particle number and therefore the interac…