Supersolids in the Bose-Hubbard Hamiltonian
Condensed Matter
2009-10-22 v1
Abstract
We use a combination of numeric and analytic techniques to determine the groun d state phase diagram of the Bose--Hubbard Hamiltonian with longer range repulsi ve interactions. At half filling one finds superfluidity and an insulating solid phase. Depending on the relative sizes of near--neighbor and next near--neighbor interactions, this solid either follows a checkerboard or a striped pattern. In neither case is there a coexistence with superfluidity. However upon doping ``supersolid'' phases appear with simultaneous diagonal and off--diagonal long range order.
Keywords
Cite
@article{arxiv.cond-mat/9404042,
title = {Supersolids in the Bose-Hubbard Hamiltonian},
author = {G. G. Batrouni and R. T. Scalettar and G. T. Zimanyi and A. P. Kampf},
journal= {arXiv preprint arXiv:cond-mat/9404042},
year = {2009}
}
Comments
11 pages, Revtex 3.0, 6 figures (upon request)