Stability of FFLO states in optical lattices with bilayer structure
arXiv:1204.4187 · doi:10.1143/JPSJ.81.074001
Abstract
We investigate the stability of the superfluid state in a bilayer fermionic optical lattice system with a confining potential, using the Bogoliubov de-Gennes equations. It is clarified that in the imbalanced case, the introduction of the interlayer hopping stabilizes the radial Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state, while makes the angular FFLO state unstable. We also discuss the system size dependence of the superfluid ground state. It is clarified that in a certain ring region the A-FFLO state is indeed realized in a large system.
6 pages, 11 figures
References in corpus (15)
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Observation of Bose-Einstein Condensation of Molecules
- Fulde-Ferrell-Larkin-Ovchinnikov State in Heavy Fermion Superconductors
- Evidence for Superfluidity of Ultracold Fermions in an Optical Lattice
- Observation of a two-dimensional Fermi gas of atoms
- Density-Matrix Renormalization Group Study of Trapped Imbalanced Fermi Condensates
- Supersolid state of ultracold fermions in an optical lattice
- Imbalanced Superfluid Phase of a Trapped Fermi Gas in the BCS-BEC Crossover Regime
- Polarized superfluidity in the attractive Hubbard model with population imbalance
- Vortex tilt modulus in Fulde-Ferrell-Larkin-Ovchinnikov state
- Coupled SDW and Superconducting Order in FFLO State of CeCoIn
- Polarized Superfluidity in the imbalanced attractive Hubbard model
- Resonant enhancement of the FFLO-state in 3D by a one-dimensional optical potential
- Population imbalanced fermions in harmonically trapped optical lattices
- Phase-separated Ferromagnetism in Spin-imbalanced Fermi Atoms Loaded on an Optical Ladder: a DMRG study