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Construction of a giant vortex state in a trapped Fermi system | | Emil Lundh
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3 Oct 2006 | | Subject: | Other | | Abstract: | A superfluid atomic Fermi system may support a giant vortex if the trapping potential is anharmonic. In such a potential, the single-particle spectrum has a positive curvature as a function of angular momentum. A tractable model is put up in which the lowest and next lowest Landau levels are occupied. Different parameter regimes are identified and characterized. Due to the dependence of the interaction on angular momentum quantum number, the Cooper pairing is at its strongest not only close to the Fermi level, but also close to the energy minimum. It is shown that the gas is superfluid in the interior of the toroidal density distribution and normal in the outer regions. Furthermore, the pairing may give rise to a localized density depression in configuration space. | | Source: | arXiv, cond-mat/0610072 | | Services: | Forum | Review | PDF | Favorites | |
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