Fermion superfluids of nonzero orbital angular momentum near resonance
We study the pairing of Fermi gases near the scattering resonance of the l not equal 0 partial wave. Using a model potential which reproduces the actual two-body low energy scattering amplitude, we have obtained an analytic solution of the gap equation. We show that the ground state of l=1 and l=3 s...
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Veröffentlicht in: | Physical review letters 2005-03, Vol.94 (9), p.090402.1-090402.4, Article 090402 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | We study the pairing of Fermi gases near the scattering resonance of the l not equal 0 partial wave. Using a model potential which reproduces the actual two-body low energy scattering amplitude, we have obtained an analytic solution of the gap equation. We show that the ground state of l=1 and l=3 superfluids are orbital ferromagnets with pairing wave functions Y11 and Y32, respectively. For l=2, there is a degeneracy between Y22 and a "cyclic state." Dipole energy will orient the angular momentum axis. The gap function can be determined by the angular dependence of the momentum distribution of the fermions. |
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ISSN: | 0031-9007 1079-7114 |
DOI: | 10.1103/physrevlett.94.090402 |