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

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

2010-11-01

arxiv.org/abs/1011.0467v2

Phys. Rev. A 82, 063615 (2010)

Physics

Condensed Matter

Quantum Gases

12 pages, 7 figures, published version

Scientific paper

10.1103/PhysRevA.82.063615

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.

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