Two-leg fermionic Hubbard ladder system in the presence of state-dependent hopping

Shun Uchino, Thierry Giamarchi
2015 Physical Review A. Atomic, Molecular, and Optical Physics  
We study a two-leg fermionic Hubbard ladder model with a state-dependent hopping. We find that, contrary to the case without a state-dependent hopping, for which the system has a superfluid nature regardless of the sign of the interaction at incommensurate filling, in the presence of such a hopping a spin-triplet superfluid, spin- density wave and charge-density wave phases emerge. We examine our results in the light of recent experiments on periodically-driven optical lattices in cold atoms.
more » ... es in cold atoms. We give protocols allowing us to realize the spin-triplet superfluid elusive in the cold atoms.
doi:10.1103/physreva.91.013604 fatcat:vwds7qssxbhetkeiazuoubw6mu