80 citations · 335 across the 15 of their papers we have counts for
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Finite temperature hydrodynamic modes of trapped quantum gases
András Csordás, Robert Graham
The hydrodynamic equations of an ideal fluid formed by a dilute quantum gas in a parabolic trapping potential are studied analytically and numerically. Due to the appearance of int…
Shifts and widths of collective excitations in trapped Bose gases by the dielectric formalism
J. Reidl, A. Csordás, R. Graham +1
We present predictions for the temperature dependent shifts and damping rates. They are obtained by applying the dielectric formalism to a simple model of a trapped Bose gas. Withi…
Finite temperature excitations of Bose gases in anisotropic traps
J. Reidl, A. Csordás, R. Graham +1
The mode frequencies of a weakly interacting Bose gas in a magnetic trap are studied as a function of the anisotropy of the trap. As in earlier works the generalized Hartree-Fock-B…
Collective excitations in Bose-Einstein condensates in triaxially anisotropic parabolic traps
András Csordás, Robert Graham
The wave equation of low-frequency density waves in Bose-Einstein condensates at vanishing temperature in arbitrarily anisotropic harmonic traps is separable in elliptic coordinate…
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…
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…