Spatially-modulated Superfluid States in Fermionic Optical Ladder Systems with Repulsive Interactions
arXiv:0809.4114 · doi:10.1103/PhysRevA.79.013610
Abstract
We investigate two-component ultracold fermionic atoms with repulsive interactions trapped in an optical lattice with a ladder structure. By applying the Bogoliubov-de Gennes equations to an effective t-J model in the strong correlation limit, we discuss how the spatially-modulated spin-singlet pairs with d-wave like symmetry are formed in the systems with trapping potentials. Furthermore, a close examination of the condensation energy as well as the local average of potential, kinetic and exchange energies by means of the variational Monte Carlo method elucidates that local particle correlations enhance the stability of the superfluid state via substantial energy gain due to singlet pairing in the high particle density region.
8 pages, 5 figures
References in corpus (50)
- Many-Body Physics with Ultracold Gases
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Cold bosonic atoms in optical lattices
- Controlling Spin Exchange Interactions of Ultracold Atoms in Optical Lattices
- Transition from a strongly interacting 1D superfluid to a Mott insulator
- A Mott insulator of fermionic atoms in an optical lattice
- The cold atom Hubbard toolbox
- Metallic and Insulating Phases of Repulsively Interacting Fermions in a 3D Optical Lattice
- Time-resolved Observation and Control of Superexchange Interactions with Ultracold Atoms in Optical Lattices
- Fermionic atoms in a 3D optical lattice: Observing Fermi-surfaces, dynamics and interactions
- Counterflow Superfluidity of Two-Species Ultracold Atoms in a Commensurate Optical Lattice
- High-temperature superfluidity of fermionic atoms in optical lattices
- A lattice of double wells for manipulating pairs of cold atoms
- Evidence for Superfluidity of Ultracold Fermions in an Optical Lattice
- Degenerate Fermi Gases of Ytterbium
- Molecules of Fermionic Atoms in an Optical Lattice
- Theory of Superconductivity in Strongly Correlated Electron Systems
- Atom interferometry with trapped Fermi gases
- Superconductivity in the two-dimensional t-J model
- Superconductivity in a Quasi One Dimensional Spin Liquid
- Formation of spatial shell structures in the superfluid to Mott insulator transition
- Properties of lightly doped t-J two-leg ladders
- Pairing states of a polarized Fermi gas trapped in a one-dimensional optical lattice
- Local quantum criticality in confined fermions on optical lattices
- Phase Diagram and Pairing Symmetry of the Two-Dimensional t-J Model by a Variation Theory
- Quasi-one-dimensional polarized Fermi superfluids
- BCS-BEC crossover on the two-dimensional honeycomb lattice
- Mott transition of fermionic atoms in a three-dimensional optical trap
- Fulde-Ferrell-Larkin-Ovchinnikov superfluidity in one-dimensional optical lattices
- Effects of disorder on two strongly correlated coupled chains
- d-wave resonating valence bond states of fermionic atoms in optical lattices
- Spin dynamics for bosons in an optical lattice
- Quantum phases of bosons in double-well optical lattices
- FFLO state in 1, 2, and 3 dimensional optical lattices combined with a non-uniform background potential
- Superfluid-Insulator Transition of Strongly Interacting Fermi Gases in Optical Lattices
- Luther-Emery Phase and Atomic-Density Waves in a Trapped Fermion Gas
- Superfluid-insulator transitions of the Fermi gas with near-unitary interactions in a periodic potential
- Cold Attractive Spin Polarized Fermi Lattice Gases and the Doped Positive U Hubbard Model
- Supersolid state of ultracold fermions in an optical lattice
- Competing superfluid and density-wave ground-states of fermionic mixtures with mass imbalance in optical lattices
- BEC-BCS crossover in an optical lattice
- Supersolids in confined fermions on one-dimensional optical lattices
- Superfluid Fermi gas in a 1D optical lattice
- Magnetic and superfluid phases of confined fermions in two-dimensional optical lattices
- Stability of Superflow for Ultracold Fermions in Optical Lattices
- Population imbalanced fermions in harmonically trapped optical lattices
- Quantum phases of Fermi-Fermi mixtures in optical lattices
- Superfuid-insulator transitions at non-integer filling in optical lattices of fermionic atoms
- Variational Monte Carlo analysis of the Hubbard model with a confining potential: one-dimensional fermionic optical lattice systems
- Fermionic superfluidity: From high Tc superconductors to ultracold Fermi gases
Cited by in corpus (7)
- Low temperature properties of the infinite-dimensional attractive Hubbard model
- Polarized Superfluidity in the imbalanced attractive Hubbard model
- Low temperature properties of the fermionic mixtures with mass imbalance in optical lattice
- Polarized superfluid state in a three-dimensional fermionic optical lattice
- Incompressible states of a two-component Fermi gas in a double-well optical lattice
- Rotating BEC in an optical lattice in Uniformly frustrated Josephson Junction arrays regime: Vortex configuration formulation for ground state
- Superfluid gap formation in a fermionic optical lattice with spin imbalanced populations