Superfluidity and magnetism in multicomponent ultracold fermions
arXiv:0705.0347 · doi:10.1103/PhysRevLett.99.130406
Abstract
We study the interplay between superfluidity and magnetism in a multicomponent gas of ultracold fermions. Ward-Takahashi identities constrain possible mean-field states describing order parameters for both pairing and magnetization. The structure of global phase diagrams arises from competition among these states as functions of anisotropies in chemical potential, density, or interactions. They exhibit first and second order phase transition as well as multicritical points, metastability regions, and phase separation. We comment on experimental signatures in ultracold atoms.
4 pages, 3 figures
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- Multi-component strongly attractive Fermi gas: a color superconductor in a one-dimensional harmonic trap
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- Competing Orders in One-Dimensional Half-Integer Fermionic Cold Atoms: A Conformal Field Theory Approach
- Unified description of pairing, trionic and quarteting states for one-dimensional SU(4) attractive fermions
- Magnetism and quantum phase transitions in spin-1/2 attractive fermions with polarization
- Stability of Inhomogeneous Multi-Component Fermi Gases
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- Diffusion Monte Carlo study of a valley degenerate electron gas and application to quantum dots