Asymmetric Fermi superfluid in a harmonic trap

We consider a dilute two-component atomic fermion gas with unequal populations in a harmonic trap potential using the mean field theory and the local density approximation. We show that the system is phase separated into concentric shells with the superfluid in the core surrounded by the normal ferm...

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Bibliographic Details
Published inJournal of physics. Condensed matter Vol. 18; no. 23; pp. 5567 - 5577
Main Authors Pao, C-H, Yip, S-K
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 14.06.2006
Institute of Physics
Subjects
Classical and quantum physics: mechanics and fields
Exact sciences and technology
Matter waves
Physics
Mean field approximation
Fermi gas
Traps
Composite particle models
Harmonic potential
Superfluid
Strong coupling
Feshbach resonance
Local density approximation
Bose-Einstein condensation
BCS theory
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Summary:We consider a dilute two-component atomic fermion gas with unequal populations in a harmonic trap potential using the mean field theory and the local density approximation. We show that the system is phase separated into concentric shells with the superfluid in the core surrounded by the normal fermion gas both on the weak-coupling BCS side and near the Feshbach resonance. On the strong-coupling BEC side, the composite bosons and left-over fermions can be mixed. We calculate the cloud radii and compare axial density profiles systemically for the BCS, near resonance and BEC regimes.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/18/23/025