Finite temperature effects in trapped Fermi gases with population imbalance

Abstract

We study the finite temperature $T$ behavior of trapped Fermi gases as they undergo BCS-Bose Einstein condensation (BEC) crossover, in the presence of a population imbalance. Our results, in qualitative agreement with recent experiments, show how the superfluid phase transition is directly reflected in the particle density profiles. We demonstrate that at $T\ne 0$ and in the near-BEC and unitary regimes, the polarization is excluded from the superfluid core. Nevertheless a substantial polarization fraction is carried by a normal region of the trap having strong pair correlations, which we associate with noncondensed pairs or the ``pseudogap phase''.

References in corpus (5)

• Direct Observation of the Superfluid Phase Transition in Ultracold Fermi Gases
• Strongly interacting Fermi gases with density imbalance
• Profiles of near-resonant population-imbalanced trapped Fermi gases
• Trapped fermions with density imbalance in the BEC limit
• Trapped Fermions across a Feshbach resonance with population imbalance

Cited by in corpus (18)

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• The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
• Fulde-Ferrell-Larkin-Ovchinnikov states in one-dimensional spin-polarized ultracold atomic Fermi gases
• Sarma Phase in Trapped Unbalanced Fermi Gases
• Effects of density imbalance on the BCS-BEC crossover in semiconductor electron-hole bilayers
• Superfluid phase diagrams of trapped Fermi gases with population imbalance
• Mean field thermodynamics of a spin-polarized spherically trapped Fermi gas at unitarity
• Superfluid shells for trapped fermions with mass and population imbalance
• Thermodynamics and superfluid density in BCS-BEC crossover with and without population imbalance
• Stability conditions and phase diagrams for two component Fermi gases with population imbalance
• Imbalanced Superfluid Phase of a Trapped Fermi Gas in the BCS-BEC Crossover Regime
• Theory of Superfluids with Population Imbalance: Finite Temperature and BCS-BEC Crossover Effects
• Non-BCS superfluidity in trapped ultracold Fermi gases
• FFLO Vortex Lattice States in Cold Fermionic-Atom Systems
• Fermi liquid theory of ultra-cold trapped Fermi gases: Implications for Pseudogap Physics and Other Strongly Correlated Phases
• Dimensional Crossover in a Spin-imbalanced Fermi gas
• Breaking and trapping Cooper pairs by Rydberg-molecule spectroscopy in atomic Fermi superfluids
• Two-dimensional spin-imbalanced Fermi gases at non-zero temperature: Phase separation of a non-condensate