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

Tomoki Ozawa, Gordon Baym

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

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.

Original languageEnglish
Article number063615
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume82
Issue number6
DOIs
Publication statusPublished - 2010 Dec 14
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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