New type of crossover physics in three-component Fermi gases
arXiv:1207.6971 · doi:10.1103/PhysRevLett.109.240401
Abstract
A three-component Fermi gas near a broad Feshbach resonance does not have a universal ground state due to the Thomas collapse, while it does near a narrow Feshbach resonance. We explore its universal phase diagram in the plane of the inverse scattering length 1/akF and the resonance range RkF. For a large RkF, there exists a Lifshitz transition between superfluids with and without an unpaired Fermi surface as a function of 1/akF. With decreasing RkF, the Fermi surface coexisting with the superfluid can change smoothly from that of atoms to trimers ("atom-trimer continuity"), corresponding to the quark-hadron continuity in a dense nuclear matter. Eventually, there appears a finite window in 1/akF where the superfluid is completely depleted by the trimer Fermi gas, which gives rise to a pair of quantum critical points. The boundaries of these three quantum phases are determined in regions where controlled analyses are possible and are also evaluated based on a mean-field plus trimer model.
6 pages, 4 figures; published with the new title
References in corpus (24)
- Many-Body Physics with Ultracold Gases
- Theory of ultracold Fermi gases
- Resonantly-paired fermionic superfluids
- Collisional stability of a three-component degenerate Fermi gas
- Three-body recombination in a three-state Fermi gas with widely tunable interactions
- Three-boson problem near a narrow Feshbach resonance
- Color Superfluidity and "Baryon" Formation in Ultracold Fermions
- New Critical Point Induced by the Axial Anomaly in Dense QCD
- Radio Frequency Association of Efimov Trimers
- Analytical solution of the bosonic three-body problem
- Induced P-wave Superfluidity in Asymmetric Fermi Gases
- Phase structure, collective modes, and the axial anomaly in dense QCD
- Superfluidity and magnetism in multicomponent ultracold fermions
- Atom-Dimer Scattering in a Three-Component Fermi Gas
- Pairing in a three component Fermi gas
- Superfluidity in a Three-flavor Fermi Gas with SU(3) Symmetry
- Population imbalance and pairing in the BCS-BEC crossover of three-component ultracold fermions
- Functional renormalization for trion formation in ultracold fermion gases
- Magnetism and domain formation in SU(3)-symmetric multi-species Fermi mixtures
- Exotic many-body physics with large-spin Fermi gases
- The Efimov effect in lithium 6
- Co-existence and shell structures of several superfluids in trapped three-component Fermi mixtures
- Phase diagram, extended domain walls, and soft collective modes in a three component fermionic superfluid
- Condensate formation with three-component ultracold fermions