436 citations · 1.2k across the 33 of their papers we have counts for
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Quasi-particle excitations and dynamical structure function of trapped Bose-condensates in the WKB approximation
András Csordás, Robert Graham, Péter Szépfalusy
The Bogoliubov equations of the quasi-particle excitations in a weakly interacting trapped Bose-condensate are solved in the WKB approximation in an isotropic harmonic trap, determ…
Macroscopic superpositions of Bose-Einstein condensates
Janne Ruostekoski, M. J. Collett, Robert Graham +1
We consider two dilute gas Bose-Einstein condensates with opposite velocities from which a monochromatic light field detuned far from the resonance of the optical transition is coh…
Classical quasi-particle dynamics in trapped Bose condensates
Martin Fliesser, András Csordás, Robert Graham +1
The dynamics of quasi-particles in repulsive Bose condensates in a harmonic trap is studied in the classical limit. In isotropic traps the classical motion is integrable and separa…
Hydrodynamic excitations of Bose condensates in anisotropic traps
Martin Fliesser, András Csordás, Péter Szépfalusy +1
The collective excitations of Bose condensates in anisotropic axially symmetric harmonic traps are investigated in the hydrodynamic and Thomas-Fermi limit. We identify an additiona…
Semiclassical wave functions and energy levels of Bose-condensed gases in spherically symmetric traps
Andr'as Csord'as, Robert Graham, P'eter Sz'epfalusy
The WKB-approximation for the Bogoliubov-equations of the quasi-particle excitations in Bose-gases with condensate is worked out in the case of spherically symmetric trap potential…