Ultracold polarized Fermi gas at intermediate temperatures

Abstract

We consider non-zero temperature properties of the polarized two-component Fermi gas. We point out that stable polarized paired states which are more stable than their phase separated counterparts with unpolarized superfluid region can exist below the critical temperature. We also solve the system behavior in a trap using the local density approximation and find gradually increasing polarization in the center of the system as the temperature is increased. However, in the strongly interacting region the central polarization increases most rapidly close to the mean-field critical temperature, which is known to be substantially higher than the critical temperature for superfluidity. This indicates that most of the phase separation occurs in the fluctuation region prior to superfluidity and that the polarization in the actual superfluid is modest.

Final published version

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Cited by in corpus (18)

• Observation of Phase Separation in a Strongly-Interacting Imbalanced Fermi Gas
• BEC-BCS crossover, phase transitions and phase separation in polarized resonantly-paired superfluids
• Finite temperature phase diagram of a polarised Fermi condensate
• Fluctuations and phase transitions in Larkin-Ovchinnikov liquid crystal states of population-imbalanced resonant Fermi gas
• Fulde-Ferrell-Larkin-Ovchinnikov states in one-dimensional spin-polarized ultracold atomic Fermi gases
• Sarma Phase in Trapped Unbalanced Fermi Gases
• Finite temperature phase diagram of a polarized Fermi gas in an optical lattice
• Imbalanced Fermi Gases at Unitarity
• Effects of density imbalance on the BCS-BEC crossover in semiconductor electron-hole bilayers
• Mean field thermodynamics of a spin-polarized spherically trapped Fermi gas at unitarity
• Finite Temperature Phase Diagram of a Two-Component Fermi Gas with Density Imbalance
• Imbalanced Superfluid Phase of a Trapped Fermi Gas in the BCS-BEC Crossover Regime
• Quantum liquid-crystal order in resonant atomic gases
• Noise correlations of the ultra-cold Fermi gas in an optical lattice
• FFLO Vortex Lattice States in Cold Fermionic-Atom Systems
• Dimensional Crossover in a Spin-imbalanced Fermi gas
• Temperature Effects in a Fermi Gas with Population Imbalance
• Pair condensation of polarized fermions in the BCS-BEC crossover