Damping of low-energy excitations of a Bose-condensed gas in the hydrodynamic regime
arXiv:cond-mat/9911238
Abstract
We develop a theory to describe the damping of elementary excitations of a Bose-condensed gas in the hydrodynamic regime for the thermal cloud. We discuss second sound in a spatially homogeneous gas and the lowest excitations of a trapped condensate.
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