Population imbalance and pairing in the BCS-BEC crossover of three-component ultracold fermions

Abstract

We investigate the phase diagram and the BCS-BEC crossover of a homogeneous three-component ultracold Fermi gas with a U(3) invariant attractive interaction. We show that the system at sufficiently low temperatures exhibits population imbalance, as well as fermionic pairing. We describe the crossover in this system, connecting the weakly interacting BCS regime of the partially population-imbalanced fermion pairing state and the BEC limit with three weakly interacting species of molecules, including pairing fluctuations within a t-matrix calculation of the particle self-energies.

12 pages, 7 figures, published version

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Cited by in corpus (18)

• Ultracold Fermi Gases with Emergent SU(N) Symmetry
• Stability of ultracold atomic Bose condensates with Rashba spin-orbit coupling against quantum and thermal fluctuations
• New type of crossover physics in three-component Fermi gases
• Pauli blocking effects and Cooper triples in three-component Fermi gases
• Emergent QCD Kondo effect in two-flavor color superconducting phase
• Trion and Dimer Formation of Three-Color Fermions
• Persistent currents in ultracold gases
• Exact eigenstates of multicomponent Hubbard models: SU($N$) magnetic $\eta$ pairing, weak ergodicity breaking, and partial integrability
• Ultrarelativistic heavy ion collisions: the first billion seconds
• Condensate formation with three-component ultracold fermions
• QCD-like phase diagram with Efimov trimers and Cooper pairs in resonantly interacting SU(3) Fermi gases
• Superfluid transition temperature and fluctuation theory of spin-orbit and Rabi-coupled fermions with tunable interactions
• Scattering resonances and pairing in a Rabi-coupled Fermi gas
• Hybrid-pair superfluidity in a strongly driven Fermi gas
• Superfluidity in multicomponent fermions via the functional renormalization group
• Fluctuation-induced first-order superfluid transition in unitary $\mathrm{SU}(N)$ Fermi gases
• Mechanisms of anomalous three-body loss in a population-imbalanced three-component Fermi gas
• Fulde-Ferrell superfluids in an asymmetric three-component Fermi Gas