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  • 1.
    Ögren, Magnus
    et al.
    Mathematical Physics, Lund Institute of Technology, Lund, Sweden.
    Kärkkäinen, K.
    Mathematical Physics, Lund Institute of Technology, Lund, Sweden.
    Yu, Y.
    Mathematical Physics, Lund Institute of Technology, Lund, Sweden.
    Reimann, S. M.
    Mathematical Physics, Lund Institute of Technology, Lund, Sweden.
    On the spin asymmetry of ground states in trapped two-component Fermi gases with repulsive interactions2007In: Journal of Physics B: Atomic, Molecular and Optical Physics, ISSN 0953-4075, E-ISSN 1361-6455, Vol. 40, no 13, p. 2653-2660Article in journal (Refereed)
    Abstract [en]

    We examine the spin asymmetry of ground states for two-dimensional, harmonically trapped two-component gases of fermionic atoms at zero temperature with weakly repulsive short-range interactions. Our main result is that, in contrast to the three-dimensional case, in two dimensions a non-trivial spin-asymmetric phase can only be caused by the shell structure. A simple, qualitative description is given in terms of an approximate single-particle model, comparing well to the standard results of Hartree-Fock or direct diagonalization methods.

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