Superfluid state of repulsively interacting three-component fermionic atoms in optical lattices

TL;DR

This paper explores the emergence of a superfluid state in three-component fermionic atoms with repulsive interactions in optical lattices, highlighting how anisotropy induces effective attraction and phase stability.

Contribution

It demonstrates that anisotropic repulsive interactions can lead to superfluidity via induced attraction, providing phase diagrams near half filling.

Findings

Superfluid state forms when two colors pair due to anisotropic interactions.

The superfluid state is stable near half filling.

Phase diagrams show dependence on temperature, filling, and interaction anisotropy.

Abstract

We investigate the superfluid state of repulsively interacting three-component (color) fermionic atoms in optical lattices. When the anisotropy of the three repulsive interactions is strong, atoms of two of the three colors form Cooper pairs and atoms of the third color remain a Fermi liquid. An effective attractive interaction is induced by density fluctuations of the third-color atoms. This superfluid state is stable against changes in filling close to half filling. We determine the phase diagrams in terms of temperature, filling, and the anisotropy of the repulsive interactions.