Variational Bose-Hubbard model revisited
arXiv:1311.7510 · doi:10.1103/PhysRevA.89.043626
Abstract
For strongly interacting bosons in optical lattices the standard description using Bose-Hubbard model becomes questionable. The role of excited bands becomes important. In such a situation we compare results of simulations using multiband Bose-Hubbard model with a recent proposition based on a time dependent variational approach. It is shown that the latter, in its original formulation, uses too small variational space leading often to spurious effects. Possible expansion of variational approach is discussed.
8 pages, 6 figures
References in corpus (7)
- The density-matrix renormalization group in the age of matrix product states
- Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
- Bose-Hubbard model with occupation dependent parameters
- Fast dynamics for atoms in optical lattices
- Dynamics of cold bosons in optical lattices: Effects of higher Bloch bands
- Optimal time-dependent lattice models for nonequilibrium dynamics
- Lattice Induced Resonances in One Dimensional Bosonic Systems
Cited by in corpus (6)
- Non-standard Hubbard models in optical lattices: a review
- Accuracy of quantum simulators with ultracold dipolar molecules: a quantitative comparison between continuum and lattice descriptions
- Superfluid phases induced by the dipolar interactions
- Hubbard model for atomic impurities bound by the vortex lattice of a rotating BEC
- Progress towards quantum-enhanced interferometry with harmonically trapped quantum matter-wave bright solitons
- Multiband Effects and the Bose-Hubbard Model in One-Dimensional Lattices