Finite-Temperature Properties of Attractive Three-Component Fermionic Atoms in Optical Lattices

Details Finite-Temperature Properties of Attractive Three-Component Fermionic Atoms in Optical Lattices Finite-Temperature Properties of Attractive Three-Component Fermionic Atoms in Optical Lattices

2009-10-04

arxiv.org/abs/0910.0648v1

Phys. Rev. A 80 (2009) 041602

Physics

Condensed Matter

Quantum Gases

4 pages, 4 figures

Scientific paper

10.1103/PhysRevA.80.041602

We investigate the finite-temperature properties of attractive three-component (colors) fermionic atoms in optical lattices using a self-energy functional approach. As the strength of the attractive interaction increases in the low-temperature region, we observe a second-order transition from a Fermi liquid to a color superfluid (CSF), where atoms from two of the three colors form Cooper pairs. In the strong attractive region, we observe a first-order transition from a CSF to a trionic state, where three atoms with different colors form singlet bound states. A crossover between a Fermi liquid and a trionic state is observed in the high-temperature region. We present a phase diagram covering zero to finite temperatures. We demonstrate that the CSF transition temperature is enhanced by the anisotropy of the attractive interaction.

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