Phases of a bilayer Fermi gas

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Nishida, Yusuke
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Abstract
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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.
Comment: 5 pages, 5 figures; (v2) stability of trimer is emphasized; (v3) published version
Keywords
Condensed Matter - Quantum Gases, Nuclear Theory
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