| Title | Strong-coupling perturbation theory for the extended Bose-Hubbard model |
| Publication Type | Journal Article |
| Year of Publication | 2009 |
| Authors | M. Iskin, and J. K. Freericks |
| Pagination | 9 |
| Date Published | mar |
| Keywords | 2009 |
| Abstract | We develop a strong-coupling perturbation theory for the extended Bose-Hubbard model with on-site and nearest-neighbor boson-boson repulsions on (\$d > 1\$)-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 \$t\$. 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. |
| URL | http://arxiv.org/abs/0903.0845 |
