Strong-coupling perturbation theory for the extended Bose-Hubbard model
Strongly Correlated Electrons
2015-05-13 v1 Other Condensed Matter
Abstract
We develop a strong-coupling perturbation theory for the extended Bose-Hubbard model with on-site and nearest-neighbor boson-boson repulsions on ()-dimensional hypercubic lattices. Analytical expressions for the ground-state phase boundaries between the incompressible (Mott or charge-density-wave insulators) and the compressible (superfluid or supersolid) phases are derived up to third order in the hopping . We also briefly discuss possible implications of our results in the context of ultracold dipolar Bose gases with dipole-dipole interactions loaded into optical lattices.
Cite
@article{arxiv.0903.0845,
title = {Strong-coupling perturbation theory for the extended Bose-Hubbard model},
author = {M. Iskin and J. K. Freericks},
journal= {arXiv preprint arXiv:0903.0845},
year = {2015}
}
Comments
9 pages, 3 figures and 1 table, to be submitted for PRA