Stability of spin-orbit coupled Fermi gases with population imbalance

Abstract

We use the self-consistent mean-field theory to analyze the effects of Rashba-type spin-orbit coupling (SOC) on the ground-state phase diagram of population-imbalanced Fermi gases throughout the BCS-BEC evolution. We find that the SOC and population imbalance are counteracting, and that this competition tends to stabilize the uniform superfluid phase against the phase separation. However, we also show that the SOC stabilizes (destabilizes) the uniform superfluid phase against the normal phase for low (high) population imbalances. In addition, we find topological quantum phase transitions associated with the appearance of momentum space regions with zero quasiparticle energies, and study their signatures in the momentum distribution.

4+ pages with 3 figures; to appear in PRL

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Cited by in corpus (86)

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• The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
• Locally Non-centrosymmetric Superconductivity in Multilayer Systems
• BCS-BEC Crossover in 2D Fermi Gases with Rashba Spin-Orbit Coupling
• Unconventional superfluid in a two-dimensional Fermi gas with anisotropic spin-orbit coupling and Zeeman fields
• Searching for Majorana Fermions in 2D Spin-orbit Coupled Fermi Superfluids at Finite Temperature
• Topological superfluid in a trapped two-dimensional polarized Fermi gas with spin-orbit coupling
• Route to Observable Fulde-Ferrell-Larkin-Ovchinnikov Phases in 3D Spin-Orbit Coupled Degenerate Fermi Gases
• Rashba spin-orbit coupled atomic Fermi gases
• Tuning the Tricritical Point with Spin-orbit Coupling in Polarized Fermionic Condensates
• Phase separation in a polarized Fermi gas with spin-orbit coupling
• Opposite effect of spin-orbit coupling on condensation and superfluidity
• BCS-BEC crossover in spin-orbit coupled two-dimensional Fermi gases
• Josephson physics of spin-orbit coupled elongated Bose-Einstein condensates
• Who is the Lord of the Rings: Majorana, Dirac or Lifshitz? The Spin-Orbit-Zeeman Saga in Ultra-cold Fermions
• Finite-Momentum Dimer Bound State in Spin-Orbit Coupled Fermi Gas
• Topological phase transitions in ultra-cold Fermi superfluids: the evolution from BCS to BEC under artificial spin-orbit fields
• Fulde-Ferrell Pairing instability in Spin-Orbit Coupled Fermi Gas
• Dynamical topological phases in quenched spin-orbit coupled degenerate Fermi gas
• Inhomogeneous Fulde-Ferrell superfluidity in spin-orbit coupled atomic Fermi gases
• Modified Bethe-Peierls boundary condition for ultracold atoms with Spin-Orbit coupling
• Pairing Superfluidity in Spin-Orbit Coupled Ultracold Fermi Gases
• Rashbons: Properties and their significance
• Interatomic collisions in two-dimensional and quasi-two-dimensional confinements with spin-orbit coupling
• Exotic pairing states in a Fermi gas with three-dimensional spin-orbit coupling
• Low-density molecular gas of tightly-bound Rashba-Dresselhaus fermions
• Quantum phases of atomic Fermi gases with anisotropic spin-orbit coupling
• Scattering and effective interactions of ultracold atoms with spin-orbit coupling
• Flow enhanced pairing and other novel effects in Fermi gases in synthetic gauge fields
• Trapped fermions in a synthetic non-Abelian gauge field
• BCS-BEC crossover in three-dimensional Fermi gases with spherical spin-orbit coupling
• Critical temperature of a Rashba spin-orbit coupled Bose gas in harmonic traps
• Dynamic density and spin responses of a superfluid Fermi gas in the BCS-BEC crossover: Path integral formulation and pair fluctuation theory
• Topological superfluid phases of an atomic Fermi gas with in- and out-of-plane Zeeman fields and equal Rashba-Dresselhaus spin-orbit coupling
• Spin-orbit Coupling Effects on the Superfluidity of Fermi Gas in an Optical Lattice
• Superfluidity and collective modes in Rashba spin-orbit coupled Fermi gases
• Tuning Rashba and Dresselhaus spin-orbit couplings: Effects on singlet and triplet condensation with Fermi atoms
• Ultracold atoms in U(2) non-Abelian gauge potentials preserving the Landau levels
• Collective excitations across the BCS-BEC crossover induced by a synthetic Rashba spin-orbit coupling
• Three-component Ultracold Fermi Gases with Spin-Orbit Coupling
• Thermodynamic signatures for topological phase transitions to Majorana and Weyl superfluids in ultracold Fermi gases
• BCS-BEC crossover at finite temperature in spin-orbit coupled Fermi gases
• Unconventional Fulde-Ferrell-Larkin-Ovchinnikov pairing states in a Fermi gas with spin-orbit coupling
• Radio-frequency spectroscopy of weakly bound molecules in spin-orbit coupled atomic Fermi gases
• Vortex line in spin-orbit coupled atomic Fermi gases
• Unusual Zeeman-field effects in two-dimensional spin-orbit-coupled Fermi superfluids
• Spin-Orbit Coupled Bose Gases at Finite Temperatures
• Large Chern Number Topological Superfluids in Coupled Layer System
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• Spectral Gaps of Spin-orbit Coupled Particles in Deformed Traps
• Polarization of a quasi two-dimensional repulsive Fermi gas with Rashba spin-orbit coupling: a variational study
• Validity of single-channel model for a spin-orbit coupled atomic Fermi gas near Feshbach resonances
• Trapped Fermi gases with Rashba spin-orbit coupling in two dimensions
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• Effective Hamiltonians for quasi-one-dimensional Fermi gases with spin-orbit coupling
• Induced interactions in the BCS-BEC crossover of two-dimensional Fermi gases with Rashba spin-orbit coupling
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• Two-dimensional quasi-ideal Fermi gas with Rashba spin-orbit coupling
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• Coexistence of topological and nontopological Fermi-superfluid phases
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• Feshbach Resonance in a Synthetic Non-Abelian Gauge Field
• Phase Diagram of a Spin-Orbit Coupled Fermi Gases in a Bilayer Optical Lattice
• Dynamical spin properties of confined Fermi and Bose systems in presence of spin-orbit coupling
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• Anomalous isothermal compressibility in spin-orbit coupled degenerate Fermi gases
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