Asymmetric Fermi superfluid in a harmonic trap

Abstract

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 in both the weak-coupling BCS side and near the Feshbach resonance. In 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.

15 pages, 5 figures

References in corpus (1)

• Weakly bound dimers of fermionic atoms

Cited by in corpus (14)

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• BEC-BCS crossover, phase transitions and phase separation in polarized resonantly-paired superfluids
• Surface Tension in Unitary Fermi Gases with Population Imbalance
• Zero Temperature Thermodynamics of Asymmetric Fermi Gases at Unitarity
• Resonant pairing between Fermions with unequal masses
• Mean field thermodynamics of a spin-polarized spherically trapped Fermi gas at unitarity
• The role of interactions in spin-polarised atomic Fermi gases at unitarity
• Evaluating the phase diagram of superconductors with asymmetric spin populations
• Asymmetric Fermi superfluid with different atomic species in a harmonic trap
• Ultracold polarized Fermi gas at intermediate temperatures
• Interferometric probe of paired states
• Trapped Resonant Fermions above Superfluid Transition Temperature
• Unconventional interaction between vortices in a polarized Fermi gas
• Phase diagram of asymmetric Fermi gas across Feshbach resonance