Quantum Phase Transitions in a Dimerized Bose-Hubbard Model: A DMRG Study
arXiv:0904.1348 · doi:10.1209/0295-5075/85/43001
Abstract
We investigate the phase diagram of a dimerized Bose-Hubbard model, using density matrix renormalization group technique. We find a new phase, which is the coexistence of superfluid and bond-wave phases, due to the effect of dimerization. Experimentally dimerization in optical lattice can be realized by using two counter propagating laser beams of different wavelengths. Apart from the conventional superfluid to Mott insulator transition, we find a new quantum phase transition: from superfluid-bond-wave to Mott insulator-bond wave phase. Our study suggests a rich phase diagram which can be easily probed.
arXiv comment5 pages, 4 figures
References in corpus (15)
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Cold bosonic atoms in optical lattices
- The density-matrix renormalization group
- Direct Observation of Second Order Atom Tunnelling
- Resonating Valence Bond Theory of Coupled Heisenberg Chains
- The one-dimensional Bose-Hubbard Model with nearest-neighbor interaction
- Phases of the one-dimensional Bose-Hubbard model
- Low-Lying Excited States and Low-Temperature Properties of an Alternating Spin-1 / Spin-1/2 Chain : A DMRG study
- Supersolids in the Bose-Hubbard Hamiltonian
- Counting atoms using interaction blockade in an optical superlattice
- Density matrix renormalization group for disordered bosons in one dimension
- Density wave and supersolid phases of correlated bosons in an optical lattice
- Exact Study of the 1D Boson Hubbard Model with a Superlattice Potential
- Metal-insulator and insulator-insulator transitions in the quarter-filled band organic conductors
- Quantum Phase Transitions in a Dimerized Bose-Hubbard Model: A DMRG Study