Integrable models for asymmetric Fermi superfluids: Emergence of a new exotic pairing phase
arXiv:cond-mat/0510635 · doi:10.1103/PhysRevLett.96.180404
Abstract
We introduce an exactly-solvable model to study the competition between the Larkin-Ovchinnikov-Fulde-Ferrell (LOFF) and breached-pair superfluid in strongly interacting ultracold asymmetric Fermi gases. One can thus investigate homogeneous and inhomogeneous states on an equal footing and establish the quantum phase diagram. For certain values of the filling and the interaction strength, the model exhibits a new stable exotic pairing phase which combines an inhomogeneous state with an interior gap to pair-excitations. It is proven that this phase is the exact ground state in the strong coupling limit, while numerical examples demonstrate that also at finite interaction strength it can have lower energy than the breached-pair or LOFF states.
arXiv commentRevised version accepted for publication
References in corpus (19)
- Observation of resonance condensation of fermionic atom pairs
- Condensation of Pairs of Fermionic Atoms Near a Feshbach Resonance
- Pairing and Phase Separation in a Polarized Fermi Gas
- Fermionic Superfluidity with Imbalanced Spin Populations and the Quantum Phase Transition to the Normal State
- Evidence for Superfluidity in a Resonantly Interacting Fermi Gas
- Exactly solvable Richardson-Gaudin models for many-body quantum systems
- Interior Gap Superfluidity
- BEC-BCS crossover in "magnetized" Feshbach-resonantly paired superfluids
- Phase separation in asymmetrical fermion superfluids
- Exactly-Solvable Models Derived from a Generalized Gaudin Algebra
- Superfluid stability in BEC-BCS crossover
- Pairing in a two-component ultracold Fermi gas: phases with broken space symmetries
- Spontaneous breaking of rotational symmetry in superconductors
- BCS-to-BEC crossover from the exact BCS solution
- Exactly-solvable models for atom-molecule hamiltonians
- Solving the Richardson equations for Fermions
- Strong Coupling Expansion for the Pairing Hamiltonian
- Electrostatic mapping of nuclear pairing
- Loop updates for quantum Monte Carlo simulations in the canonical ensemble
Cited by in corpus (26)
- BEC-BCS crossover, phase transitions and phase separation in polarized resonantly-paired superfluids
- The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
- Fluctuations and phase transitions in Larkin-Ovchinnikov liquid crystal states of population-imbalanced resonant Fermi gas
- Phase Transitions and Pairing Signature in Strongly Attractive Fermi Atomic Gases
- LOFF Pairing vs. Breached Pairing in Asymmetric Fermion Superfluids
- Superfluidity at the BEC-BCS crossover in two-dimensional Fermi gases with population and mass imbalance
- Exact mesoscopic correlation functions of the pairing model
- Finite Temperature Phase Diagram of a Two-Component Fermi Gas with Density Imbalance
- Fermion pairing with spin-density imbalance in an optical lattice
- Hartree-Fock-Bogoliubov Theory of Polarized Fermi Systems
- Breakdown of the local density approximation in interacting systems of cold fermions in strongly anisotropic traps
- Imbalanced Fermi superfluid in a one-dimensional optical potential
- Breached pairing in trapped three-color atomic Fermi gases
- Quantum liquid-crystal order in resonant atomic gases
- Generalised Heine-Stieltjes and Van Vleck polynomials associated with degenerate, integrable BCS models
- Imbalanced d-wave superfluids in the BCS-BEC crossover regime at finite temperatures
- Quench dynamics of spin-imbalanced Fermi-Hubbard model in one dimension
- Anomalous specific heat jump in a two-component ultracold Fermi gas
- Superfluidity in density imbalanced bilayers of dipolar fermions
- Development of an apparatus for cooling 6Li-87Rb Fermi-Bose mixtures in a light-assisted magnetic trap
- Integrable model of a -wave bosonic superfluid
- Fulde-Ferrell states in unequally charged Fermi gases
- Flow and critical velocity of an imbalanced Fermi gas through an optical potential
- Challenges for Modeling Nuclear Structure: Are the Proton and Neutron Masses and A-body Interactions Relevant?
- Integrable Model of a Superconductor with non-Fermi liquid and Mott Phases
- Breached pair superfluidity: a brief review