Quantal kinetic equations for particle and current densities of condensate and non-condensate in a confined Bose-condensed fluid are set up by expansion of the one-body density matrix about its diagonal. A microscopic Landau equation for superfluid flow in the inhomogeneous system is derived. Current-density functional theory in the local (long-wavelength) approximation is then used to propose a unified treatment of various damping mechanisms. (C) 1997 Elsevier Science B.V.
Generalized quantum hydrodynamics of a trapped dilute Bose gas
CHIOFALO, MARIA LUISA;
1997-01-01
Abstract
Quantal kinetic equations for particle and current densities of condensate and non-condensate in a confined Bose-condensed fluid are set up by expansion of the one-body density matrix about its diagonal. A microscopic Landau equation for superfluid flow in the inhomogeneous system is derived. Current-density functional theory in the local (long-wavelength) approximation is then used to propose a unified treatment of various damping mechanisms. (C) 1997 Elsevier Science B.V.File in questo prodotto:
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