The Landau-Khalatnikov two-fluid hydrodynamics equations which was used to derive general expressions for the frequency and damping of hydrodynamic modes in a trapped Bose-condensed gas was discussed. The expressions were derived using variational solution of the two-fluid hydrodynamic equations in the Landau limit. It was observed that the expressions were use to evaluate the hydrodynamic damping of the monople-quadropole condensate mode where mode is zero in the superfluid phase. The crossover from the collisionless to the hydrodynamic region was discussed using the moment method.
|Number of pages||2124376|
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Publication status||Published - Feb 2004|