The quasiclassical description of an inhomogeneous Fermi superfluid

The derivation of the quasiclassical equations considered here depends on the structure of the Gor'kov equations. In a spatially varying situation they couple particle and hole functions with momenta only very near the Fermi surface. The equations are written in a form in which the dependence o...

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Bibliographic Details
Published in:Journal of low temperature physics 1999, Vol.115 (5-6), p.243-249
Main Author: WATTS-TOBIN, R. J
Format: Article
Language:English
Subjects:
Approximation theory
Boson degeneracy and superfluidity of 4he
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Fermi level
Fermi surface
Green's function
Physics
Quantum fluids and solids
liquid and solid helium
Superfluid phase of liquid 3he
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Summary:The derivation of the quasiclassical equations considered here depends on the structure of the Gor'kov equations. In a spatially varying situation they couple particle and hole functions with momenta only very near the Fermi surface. The equations are written in a form in which the dependence on the Fermion excitation energy can be integrated out. This produces an envelope function which describes the spatial superfluid structure, but not the oscillations of the full Green's function on the scale of the Fermi wavelength.
ISSN:0022-2291
1573-7357
DOI:10.1023/a:1021827503594