Bose-Hubbard model with occupation-parity couplings
arXiv:1309.3709 · doi:10.1103/PhysRevB.89.064506
Abstract
We study a Bose-Hubbard model having on-site repulsion, nearest-neighbor tunneling, and ferromagneticlike coupling between occupation parities of nearest-neighbor sites. For a uniform system in any dimension at zero tunneling, we obtain an exact phase diagram characterized by Mott-insulator (MI) and pair liquid phases and regions of phase separation of two MIs. For a general trapped system in one and two dimensions with finite tunneling, we perform quantum Monte Carlo and Gutzwiller mean-field calculations, both of which show the evolution of the system, as the parity coupling increases, from a superfluid to wedding-cake-structure MIs with their occupations jumping by 2. We also identify an exotic pair superfluid at relatively large tunneling strength. Our model ought to effectively describe recent findings in imbalanced Fermi gases in two-dimensional optical lattices and also potentially apply to an anisotropic version of bilinear-biquadratic spin systems.
9 pages, 5 figures
References in corpus (37)
- Many-Body Physics with Ultracold Gases
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Theory of ultracold Fermi gases
- Strongly Interacting Polaritons in Coupled Arrays of Cavities
- Quantum phase transitions of light
- The ALPS project release 1.3: open source software for strongly correlated systems
- Quench dynamics and non equilibrium phase diagram of the Bose-Hubbard model
- Orbital superfluidity in the -band of a bipartite optical square lattice
- Imaging the Mott Insulator Shells using Atomic Clock Shifts
- Generalized Directed Loop Method for Quantum Monte Carlo Simulations
- Implementation of Spin Hamiltonians in Optical Lattices
- Mixtures of Bosonic and Fermionic Atoms in Optical Lattices
- Spin nematic correlations in bilinear-biquadratic S=1 spin chains
- Topological orbital ladders
- Quasi-one-dimensional polarized Fermi superfluids
- The Prediction of a Gapless Topological "Haldane Liquid" Phase in a One-Dimensional Cold Polar Molecular Lattice
- Cluster Gutzwiller method for bosonic lattice systems
- Larkin-Ovchinnikov state in resonant Fermi gas
- Long-time behavior of the momentum distribution during the sudden expansion of a spin-imbalanced Fermi gas in one dimension
- Pair Superfluidity of Three-Body Constrained Bosons in Two Dimensions
- Finite temperature phase diagram of a spin-polarized ultracold Fermi gas in a highly elongated harmonic trap
- Phase Diagram of Interacting Bosons on the Honeycomb Lattice
- Interaction-induced chiral p_x \pm i p_y superfluid order of bosons in an optical lattice
- Solids and supersolids of three-body interacting polar molecules in an optical lattice
- Expansion of 1D polarized superfluids: The FFLO state reveals itself
- Successive phase transitions at finite temperatures of the supersolid in the three-dimensional extended Bose-Hubbard model
- Gutzwiller approach to the Bose-Hubbard model with random local impurities
- Simulations of ultracold bosonic atoms in optical lattices with anharmonic traps
- Edge Transport in 2D Cold Atom Optical Lattices
- Concomitant Modulated Superfluidity In Polarized Fermionic Gases
- Thermal Phase transitions in attractive extended Bose-Hubbard Model with three-body constraint
- Exotic phases of interacting p-band bosons
- Bogoliubov-de Gennes study of trapped spin-imbalanced unitary Fermi gases
- Formation and detection of a chiral orbital Bose liquid in an optical lattice
- Oscillatory pairing of fermions in spin-split traps
- Dissociation dynamics of resonantly coupled bose-fermi mixtures in an optical lattice
- Dynamic Phase Diagram for the Quantum Phase Model