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

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Abstract

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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Ämnesklassifikation (UKÄ) – OBLIGATORISK

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Originalspråkengelska
Sidor (från-till)2653-2660
TidskriftJournal of Physics B: Atomic, Molecular and Optical Physics
Volym40
Utgåva nummer13
StatusPublished - 2007
PublikationskategoriForskning
Peer review utfördJa