Theory of the Normal/Superfluid interface in population imbalanced Fermi gases

Abstract

We present a series of theoretical studies of the boundary between a superfluid and normal region in a partially polarized gas of strongly interacting fermions. We present mean-field estimates of the surface energy in this boundary as a function of temperature and scattering length. We discuss the structure of the domain wall, and use a previously introduced phenomonological model to study its influence on experimental observables. Our microscopic mean-field calculations are not consistent with the magnitude of the surface tension found from our phenomonological modelling of data from the Rice experiments. We conclude that one must search for novel mechanisms to explain the experiments.

15 pages, 9 figures (13 subfigures) -- v2: minor changes

References in corpus (35)

• Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
• Universal phase diagram of a strongly interacting Fermi gas with unbalanced spin populations
• Molecular Probe of Pairing in the BEC-BCS Crossover
• Direct Observation of the Superfluid Phase Transition in Ultracold Fermi Gases
• Phase diagram of a two-component Fermi gas with resonant interactions
• Normal state of a polarized Fermi gas at unitarity
• Deformation of a Trapped Fermi Gas with Unequal Spin Populations
• Critical Temperature and Thermodynamics of Attractive Fermions at Unitarity
• Finite temperature phase diagram of a polarised Fermi condensate
• BEC-BCS crossover, phase transitions and phase separation in polarized resonantly-paired superfluids
• Strongly interacting Fermi gases with density imbalance
• Quasi-one-dimensional polarized Fermi superfluids
• Phase diagram of a cold polarized Fermi gas
• Mean field phase diagrams of imbalanced Fermi gases near a Feshbach resonance
• Two-species fermion mixtures with population imbalance
• A Unitary Fermi Supersolid: The Larkin-Ovchinnikov Phase
• Generic Phase Diagram of Fermion Superfluids with Population Imbalance
• Profiles of near-resonant population-imbalanced trapped Fermi gases
• Trapped fermions with density imbalance in the BEC limit
• Sarma Phase in Trapped Unbalanced Fermi Gases
• Trapped Fermions across a Feshbach resonance with population imbalance
• Surface Tension in Unitary Fermi Gases with Population Imbalance
• Larkin-Ovchinnikov state in resonant Fermi gas
• Renormalization Group Theory for the Imbalanced Fermi Gas
• LOFF Pairing vs. Breached Pairing in Asymmetric Fermion Superfluids
• Superfluid phase diagrams of trapped Fermi gases with population imbalance
• Mean field thermodynamics of a spin-polarized spherically trapped Fermi gas at unitarity
• Breached Superfluidity via P-Wave Coupling
• Breakdown of the local density approximation in interacting systems of cold fermions in strongly anisotropic traps
• Imbalanced Superfluid Phase of a Trapped Fermi Gas in the BCS-BEC Crossover Regime
• Trapped fermionic clouds distorted from the trap shape due to many-body effects
• Non-BCS superfluidity in trapped ultracold Fermi gases
• Surface Energy in Cold Asymmetrical Fermion Superfluids
• Polarized superfluids near their tricritical point
• Effective Lagrangian of unitary Fermi gas from $\epsilon$ expansion

Cited by in corpus (20)

• Imbalanced Feshbach-resonant Fermi gases
• The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
• Repulsive Fermi gas in a harmonic trap: Ferromagnetism and spin textures
• Evaporative depolarization and spin transport in a unitary trapped Fermi gas
• Metastability in Spin-Polarized Fermi Gases
• Concomitant Modulated Superfluidity In Polarized Fermionic Gases
• Stability of Sarma phases in density imbalanced electron-hole bilayer systems
• Superfluidity in Two-Dimensional Imbalanced Fermi Gases
• Mean-field study of itinerant ferromagnetism in trapped ultracold Fermi gases: Beyond the local density approximation
• Fulde-Ferrell-Larkin-Ovchinnikov state in bilayer dipolar systems
• Quantum engineering of Majorana quasiparticles in one-dimensional optical lattices
• Dynamical properties of the unitary Fermi gas: collective modes and shock waves
• Atomic boson-fermion mixtures in 1D box potentials: Few-body and mean-field many-body analyses
• Transport of Spin and Mass at Normal-Superfluid Interfaces in the Unitary Fermi Gas
• Linear response of heat conductivity of normal-superfluid interface of a polarized Fermi gas to orbital magnetic field
• Thermodynamics of Trapped Imbalanced Fermi Gases at Unitarity
• Coexistence of topological and nontopological Fermi-superfluid phases
• Dependence of interface conductivity on relevant physical parameters in polarized Fermi mixtures
• Density and Spin Linear Response of Atomic Fermi Superfluids with Population Imbalance in BCS-BEC Crossover
• The Gor'kov and Melik-Barkhudarov correction to an imbalanced Fermi gas in the presence of impurities