Two-Fluid Hydrodynamics in Trapped Bose Gases and in Superfluid Helium

被引:0
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作者
Allan Griffin
Tetsuro Nikuni
机构
[1] University of Toronto,Department of Physics
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关键词
Kinetic Equation; Relative Motion; Significant Fraction; Finite Temperature; Hydrodynamic Equation;
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摘要
A review is given of recent theoretical work on the superfluid dynamics of trapped Bose gases at finite temperatures, where there is a significant fraction of non-condensate atoms. One can now reach large enough densities and collision cross-sections needed to probe the collective modes in the collision-dominated hydrodynamic region where the gas exhibits characteristic superfluid behavior involving the relative motions of the condensate and non-condensate components. The precise analogue of the Landau-Khalatnikov two-fluid hydrodynamic equations was recently derived from trapped Bose gases, starting from a generalized Gross-Pitaevskii equation for the condensate macroscopic wavefunction and a kinetic equation for the non-condensate atoms.
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页码:247 / 256
页数:9
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