Dynamics of Bose condensed gases in highly deformed traps

Details Dynamics of Bose condensed gases in highly deformed traps Dynamics of Bose condensed gases in highly deformed traps

1998-01-08

arxiv.org/abs/cond-mat/9801067v1

Physics

Condensed Matter

12 pages Revtex, no figures

Scientific paper

10.1103/PhysRevA.58.2385

We provide a unified investigation of normal modes and sound propagation at zero temperature in Bose condensed gases confined in highly asymmetric harmonic traps and interacting with repulsive forces. By using hydrodynamic theory for superfluids we obtain explicit analytic results for the dispersion law of the low energy discretized modes for both cigar and disk shaped geometries, including the regime of large quantum numbers where discrete modes can be identified with phonons. The correspondence with sound propagation in cylindrical traps and the one-dimensional nature of cigar type configurations are explicitly discussed.

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