2006/10/03 by Emil Lundh
Physics and Astronomy · #Angular momentum #Anharmonicity #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Cooper pair #Fermi Gamma-ray Space Telescope #Fermi gas #Momentum (technical analysis) #Pairing #Physics #Position and momentum space #Quantum mechanics #Quantum, superfluid, helium dynamics #Superconductivity #Superfluidity #Vortex #cond-mat.other
paper · pdf · doi:10.1088/1367-2630/8/12/304
12 pages, 14 figure files
arxiv created 2006/10/03 · openalex publication_date 2006/12/06 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 presented 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.