Fulde-Ferrell-Larkin-Ovchinnikov states in equally populated Fermi gases in a two-dimensional moving optical lattice*

We study the possibility of stabilizing a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state in an equally populated two-component Fermi gas trapped in a moving two-dimensional optical lattice. For a system with nearly half filling, we find that a finite pairing momentum perpendicular to the moving direction can be spontaneously induced for a proper choice of lattice velocity. As a result, the total pairing momentum is tilted towards the nesting vector to take advantage of the significant enhancement of the density of states.

Automated summary

We investigated the possibility of stabilizing an FFLO state in a two-component Fermi gas trapped in a moving two-dimensional optical lattice, finding that a finite pairing momentum can be induced perpendicular to the moving direction for nearly half filling, leading to a tilt of the total pairing momentum towards the nesting vector for an enhancement of the density of states.