Phases of a bilayer Fermi gas

Abstract

We investigate a two-species Fermi gas in which one species is confined in two parallel layers and interacts with the other species in the three-dimensional space by a tunable short-range interaction. Based on the controlled weak coupling analysis and the exact three-body calculation, we show that the system has a rich phase diagram in the plane of the effective scattering length and the layer separation. Resulting phases include an interlayer s-wave pairing, an intralayer p-wave pairing, a dimer Bose-Einstein condensation, and a Fermi gas of stable Efimov-like trimers. Our system provides a widely applicable scheme to induce long-range interlayer correlations in ultracold atoms.

5 pages, 5 figures; (v2) stability of trimer is emphasized; (v3) published version

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Cited by in corpus (26)

• Efimov Physics: a review
• Two-dimensional scattering and bound states of polar molecules in bilayers
• Observation of spin-spin fermion-mediated interactions between ultracold bosons
• Feshbach resonances in the 6Li-40K Fermi-Fermi mixture: Elastic versus inelastic interactions
• Liberating Efimov physics from three dimensions
• New type of crossover physics in three-component Fermi gases
• Confinement-induced p-wave resonances from s-wave interactions
• Unitary Fermi gas, epsilon expansion, and nonrelativistic conformal field theories
• Effect of interlayer processes on the superconducting state within t-J-U model: Full Gutzwiller wave-function solution and relation to experiment
• Long range mediated interactions in a mixed dimensional system
• Time-reversal invariant topological superfluids in Bose-Fermi mixtures
• Fermi-Bose mixture in mixed dimensions
• U(3) artificial gauge fields for cold atoms
• Three-body forces and Efimov physics in nuclei and atoms
• Cooper pairing and BCS-BEC evolution in mixed-dimensional Fermi gases
• Adiabatic Hyperspherical Representation for the Three-body Problem in Two Dimensions
• Large Chern Number Topological Superfluids in Coupled Layer System
• Strongly interacting Bose-Fermi mixture: mediated interaction, phase diagram and sound propagation
• Quasi-1D scattering with general transverse 2D confinement
• From antiferromagnetic order to magnetic textures in the two dimensional Fermi Hubbard model with synthetic spin orbit interaction
• Stable Heteronuclear Few-Atom Bound States in Mixed Dimensions
• Possible quantum phase-manipulation of a two-leg ladder in mixed-dimensional fermionic cold atoms
• $SU(3)$ Topological Insulators in the Honeycomb Lattice
• Optical lattices with large scattering length: Using few-body physics to simulate an electron-phonon system
• Exotic superfluidity and pairing phenomena in atomic Fermi gases in mixed dimensions
• Spin dependent inelastic collisions between metastable state two-electron atoms and ground state alkali-atoms