Attractive Fermi Gases with Unequal Spin Populations in Highly Elongated Traps

Journal Article · Fri Feb 16 04:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.98.070402· OSTI ID:20955455

Orso, G ^[1]

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1. BEC-INFM and Dipartimento di Fisica, Universita di Trento, 1-38050 Povo (Italy)

We investigate two-component attractive Fermi gases with imbalanced spin populations in trapped one-dimensional configurations. The ground state properties are determined with the local density approximation, starting from the exact Bethe-ansatz equations for the homogeneous case. We predict that the atoms are distributed according to a two-shell structure: a partially polarized phase in the center of the trap and either a fully paired or a fully polarized phase in the wings. The partially polarized core is expected to be a superfluid of the Fulde-Ferrell-Larkin-Ovchinnikov type. The size of the cloud as well as the critical spin polarization needed to suppress the fully paired shell are calculated as a function of the coupling strength.

• OSTI ID: 20955455
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 7 Vol. 98; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
APPROXIMATIONS
EQUATIONS
FERMI GAS
GROUND STATES
ONE-DIMENSIONAL CALCULATIONS
RADIOACTIVE CLOUDS
SPIN
SPIN ORIENTATION
SUPERFLUIDITY
TRAPPING
TRAPS