Damping in dilute Bose gases: a mean-field approach

Abstract

Damping in a dilute Bose gas is investigated using a mean-field approximation which describes the coupled oscillations of condensate and non-condensate atoms in the collisionless regime. Explicit results for both Landau and Beliaev damping rates are given for non-uniform gases. In the case of uniform systems we obtain results for the damping of phonons both at zero and finite temperature. The isothermal compressibility of a uniform gas is also discussed.

24 pages, 1 figure, RevTex, submitted to Phys. Rev. A

References in corpus (3)

• Landau damping in dilute Bose gases
• Collective and single particle excitations of a trapped Bose gas
• Scaling and thermodynamics of a trapped Bose-condensed gas

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