Superfluid stability in BEC-BCS crossover

Abstract

We consider a dilute atomic gas of two species of fermions with unequal concentrations under a Feshbach resonance. We find that the system can have distinct properties due to the unbound fermions. The uniform state is stable only when either (a) beyond a critical coupling strength, where it is a gapless superfluid, or (b) when the coupling strength is sufficiently weak, where it is a normal Fermi gas mixture. Phase transition(s) must therefore occur when the resonance is crossed.

4 pages, 4 figures

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Cited by in corpus (125)

• Theory of ultracold Fermi gases
• The Physics of Pair Density Waves
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• The BCS-BEC crossover: From ultra-cold Fermi gases to nuclear systems
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• Imbalanced Feshbach-resonant Fermi gases
• BEC-BCS crossover, phase transitions and phase separation in polarized resonantly-paired superfluids
• Finite temperature phase diagram of a polarised Fermi condensate
• Polaron to molecule transition in a strongly imbalanced Fermi gas
• Renormalization group fixed points, universal phase diagram, and 1/N expansion for quantum liquids with interactions near the unitarity limit
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• BEC-BCS Crossover in the Nambu--Jona-Lasinio Model of QCD
• 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
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• Fulde-Ferrell-Larkin-Ovchinnikov states in one-dimensional spin-polarized ultracold atomic Fermi gases
• Generic Phase Diagram of Fermion Superfluids with Population Imbalance
• Cooling and thermometry of atomic Fermi gases
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• Polarized Fermi condensates with unequal masses: Tuning the tricritical point
• Effects of density imbalance on the BCS-BEC crossover in semiconductor electron-hole bilayers
• Larkin-Ovchinnikov state in resonant Fermi gas
• Intermediate temperature superfluidity in an atomic Fermi gas with population imbalance
• Pion Condensation in Baryonic Matter: from Sarma Phase to Larkin-Ovchinnikov-Fudde-Ferrell Phase
• Tuning the Tricritical Point with Spin-orbit Coupling in Polarized Fermionic Condensates
• LOFF Pairing vs. Breached Pairing in Asymmetric Fermion Superfluids
• BCS-BEC crossover in an asymmetric two-component Fermi gas
• Finite temperature phase diagram of a spin-polarized ultracold Fermi gas in a highly elongated harmonic trap
• Superfluidity at the BEC-BCS crossover in two-dimensional Fermi gases with population and mass imbalance
• Resonant pairing between Fermions with unequal masses
• Mean field thermodynamics of a spin-polarized spherically trapped Fermi gas at unitarity
• Mixtures of ultracold fermions with unequal masses
• Relativistic BCS-BEC crossover in a boson-fermion model
• Fulde-Ferrell-Larkin-Ovchinnikov state in disordered s-wave superconductors
• Superfluid shells for trapped fermions with mass and population imbalance
• Phase Diagram of Cold Polarized Fermi Gas in Two Dimensions
• Stability conditions and Fermi surface topologies in a superconductor
• Thermodynamics and superfluid density in BCS-BEC crossover with and without population imbalance
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• Strongly correlated Fermi superfluid near an orbital Feshbach resonance: Stability, equation of state and Leggett mode
• Finite Temperature Phase Diagram of a Two-Component Fermi Gas with Density Imbalance
• Fermi-Fermi Mixtures in the Strong Attraction Limit
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• Enhancement effect of mass imbalance on Fulde-Ferrell-Larkin-Ovchinnikov type of pairing in Fermi-Fermi mixtures of ultracold quantum gases
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• Integrable models for asymmetric Fermi superfluids: Emergence of a new exotic pairing phase
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• Evaluating the phase diagram of superconductors with asymmetric spin populations
• 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
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• Stable gapless superconductivity at strong coupling
• Gap solitons in superfluid boson-fermion mixtures
• Spin-polarized droplets in the unitary Fermi gas
• Neutral Color Superconductivity Including Inhomogeneous Phases at Finite Temperature
• Superfluidity and collective modes in Rashba spin-orbit coupled Fermi gases
• Quantum liquid-crystal order in resonant atomic gases
• Detecting the breached pair phase in a polarized ultracold Fermi gas
• Asymmetric Fermi superfluid with different atomic species in a harmonic trap
• Instability of Fulde-Ferrell-Larkin-Ovchinnikov states in three and two dimensions
• Fermion Cooper Pairing with Unequal Masses: Standard Field Theory Approach
• Finite temperature effects in trapped Fermi gases with population imbalance
• Asymmetric Fermi superfluid in a harmonic trap
• Phase separation in imbalanced fermion superfluids beyond mean-field
• Comment on "Superfluid stability in the BEC-BCS crossover"
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• Quantum phases of Fermi-Fermi mixtures in optical lattices
• Trapped Resonant Fermions above Superfluid Transition Temperature
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• Anomalous Dimers in Quantum Mixtures near Broad Resonances: Pauli Blocking, Fermi Surface Dynamics and Implications
• Quench dynamics of spin-imbalanced Fermi-Hubbard model in one dimension
• Lattice structures of Larkin-Ovchinnikov-Fulde - Ferrell (LOFF) state
• Spinodal decomposition in polarised Fermi superfluids
• Fermion superfluid with hybridized $s$- and $p$-wave pairings
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• Spin-Imbalanced Fermi Superfluidity in a Lieb Lattice Hubbard Model
• Trap-imbalanced fermion mixtures
• Gapless Surfaces in Anisotropic Superfluids
• Dimensional Crossover in a Spin-imbalanced Fermi gas
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• Quantum condensation in electron-hole bilayers with density imbalance
• Temperature Effects in a Fermi Gas with Population Imbalance
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• Homogeneous Fermion Superfluid with Unequal Spin Populations
• Collective modes in asymmetric ultracold Fermi systems
• Topological transitions of gapless paired states in mixed-geometry lattices
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• Analytical Results for Cold Asymmetrical Fermion Superfluids at the Mean-Field Level
• Exotic superfluidity and pairing phenomena in atomic Fermi gases in mixed dimensions
• Phase diagram of imbalanced fermions in optical lattices
• Stability of the Breached Pair State for a Two-species Fermionic System in the Presence of Feshbach Resonance
• Superfluidity in density imbalanced bilayers of dipolar fermions
• Pairing in Asymmetrical Fermi Systems with Intra- and Inter-Species Correlations
• Induced superfluidity of imbalanced Fermi gases near unitarity
• Effective control of chemical potentials by Rabi coupling with rf-fields in ultracold mixtures
• Phase Diagram of Neutron-Proton Condensate in Asymmetric Nuclear Matter
• Superfluidity and pairing phenomena in ultracold atomic Fermi gases in one-dimensional optical lattices, Part II: Effects of population imbalance
• Density and Spin Linear Response of Atomic Fermi Superfluids with Population Imbalance in BCS-BEC Crossover
• Ground states of atomic Fermi gases in a two-dimensional optical lattice with and without population imbalance
• Pairing imbalance in BCS-BEC crossover of inhomogeneous three-component Fermi-gas in two dimensions
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• Anomalous Superfluid Density in Pair-Density-Wave Superconductors
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