On the spin asymmetry of ground states in trapped two-component Fermi gases with repulsive interactions

Details On the spin asymmetry of ground states in trapped two-component Fermi gases with repulsive interactions On the spin asymmetry of ground states in trapped two-component Fermi gases with repulsive interactions

2007-02-26

arxiv.org/abs/cond-mat/0702600v1

J. Phys. B: At. Mol. Opt. Phys. 40 (2007) 2653-2660.

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1088/0953-4075/40/13/010

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 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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