Fermi-Fermi Mixtures in the Strong Attraction Limit
arXiv:0709.4424 · doi:10.1103/PhysRevA.77.013625
Abstract
The phase diagrams of low density Fermi-Fermi mixtures with equal or unequal masses and equal or unequal populations are described at zero and finite temperatures in the strong attraction limit. In this limit, the Fermi-Fermi mixture can be described by a weakly interacting Bose-Fermi mixture, where the bosons correspond to Feshbach molecules and the fermions correspond to excess atoms. First, we discuss the three and four fermion scattering processes, and use the exact boson-fermion and boson-boson scattering lengths to generate the phase diagrams in terms of the underlying fermion-fermion scattering length. In three dimensions, in addition to the normal and uniform superfluid phases, we find two stable non-uniform states corresponding to (1) phase separation between pure unpaired (excess) and pure paired fermions (molecular bosons); and (2) phase separation between pure excess fermions and a mixture of excess fermions and molecular bosons. Lastly, we also discuss the effects of the trapping potential in the density profiles of condensed and non-condensed molecular bosons, and excess fermions at zero and finite temperatures, and discuss possible implications of our findings to experiments involving mixtures of ultracold fermions.
12 Pages, 6 Figures and 1 Table
References in corpus (39)
- Observation of resonance condensation of fermionic atom pairs
- Vortices and Superfluidity in a Strongly Interacting Fermi Gas
- Pairing and Phase Separation in a Polarized Fermi Gas
- Fermionic Superfluidity with Imbalanced Spin Populations and the Quantum Phase Transition to the Normal State
- Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
- Experimental Study of the BEC-BCS Crossover Region in Lithium 6
- Observation of Phase Separation in a Strongly-Interacting Imbalanced Fermi Gas
- Molecular Probe of Pairing in the BEC-BCS Crossover
- Interior Gap Superfluidity
- Heat Capacity of a Strongly-Interacting Fermi Gas
- BEC-BCS crossover in "magnetized" Feshbach-resonantly paired superfluids
- Degenerate Fermi Gases of Ytterbium
- Phase separation in asymmetrical fermion superfluids
- Three-body problem in Fermi gases with short-range interparticle interaction
- Asymmetric Two-component Fermion Systems in Strong Coupling
- Deformation of a Trapped Fermi Gas with Unequal Spin Populations
- Normal state of a polarized Fermi gas at unitarity
- Zero-temperature phase diagram of binary boson-fermion mixtures
- BCS-BEC crossover at finite temperature for superfluid trapped Fermi atoms
- Superfluid stability in BEC-BCS crossover
- Strongly interacting Fermi gases with density imbalance
- Two-species fermion mixtures with population imbalance
- Profiles of near-resonant population-imbalanced trapped Fermi gases
- Superfluid transition temperature in a trapped gas of Fermi atoms with a Feshbach resonance
- Trapped fermions with density imbalance in the BEC limit
- Pairing in a two-component ultracold Fermi gas: phases with broken space symmetries
- Diatomic molecules in ultracold Fermi gases - Novel composite bosons
- Trapped Fermions across a Feshbach resonance with population imbalance
- Pairing of a trapped resonantly-interacting fermion mixture with unequal spin populations
- Polarized Fermi condensates with unequal masses: Tuning the tricritical point
- Non-standard pairing in asymmetric trapped Fermi gases
- Properties of the strongly paired fermionic condensates
- Resonant pairing between Fermions with unequal masses
- Temperature-dependent density profiles of trapped boson-fermion mixtures
- Mean field thermodynamics of a spin-polarized spherically trapped Fermi gas at unitarity
- Mixtures of ultracold fermions with unequal masses
- Superfluid shells for trapped fermions with mass and population imbalance
- Imbalanced Fermi superfluid in a one-dimensional optical potential
- Spin-polarized Fermi superfluids as Bose-Fermi mixtures
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- Theory of ultracold Fermi gases
- Efimov Physics: a review
- Ultra-cold Polarized Fermi Gases
- Realization of a strongly interacting Bose-Fermi mixture from a two-component Fermi gas
- Analytical theory of the dressed bound state in highly polarized Fermi gases
- Population and mass imbalance in atomic Fermi gases
- Superfluidity at the BEC-BCS crossover in two-dimensional Fermi gases with population and mass imbalance
- The evolution from BCS to BEC superfluidity in the presence of disorder
- On the Efimov Effect in Higher Partial Waves
- Multimer formation in 1D two-component gases and trimer phase in the asymmetric attractive Hubbard model
- Small mass- and trap-imbalanced two-component Fermi systems
- Highly Polarized Fermi Gases across a Narrow Feshbach Resonance
- Quantum phases of Fermi-Fermi mixtures in optical lattices
- Finite-Temperature Behavior of an Inter-species Fermionic Superfluid with Population Imbalance
- Density profiles of polarized Fermi gases confined in harmonic traps
- Dimer-atom scattering between two identical fermions and a third particle
- Phase diagrams of Fermi gases in a trap with mass and population imbalances at finite temperature
- Equation of state of a polarized Fermi gas in the Bose-Einstein Condensate limit
- Dimer-dimer scattering length for fermions with different masses: analytical study for large mass ratio
- Atom-dimer scattering length for fermions with different masses: analytical study of limiting cases
- Vortex core states in superfluid Fermi-Fermi mixtures with unequal masses
- Atom-dimer scattering amplitude for fermionic mixtures with different masses: s-wave and p-wave contributions
- Superfluid transition temperature and fluctuation theory of spin-orbit and Rabi-coupled fermions with tunable interactions
- Mass-imbalanced Fermi gases with spin-orbit coupling
- Second root of dilute Bose-Fermi mixtures
- Dynamical properties of a few mass-imbalanced ultra-cold fermions confined in a double-well potential
- Self-binding of one-dimensional fermionic mixtures with zero-range interspecies attraction
- Mechanical stability of resonant Bose-Fermi mixtures
- Energy of strongly attractive Bose-Fermi mixtures
- Spin-1/2 fermions with attractive interaction in an optical lattice
- Atom-dimer and dimer-dimer scatterings in a spin-orbit coupled Fermi gas
- Coboson many-body formalism for atom-dimer scattering length