Topological Bose-Mott Insulators in a One-Dimensional Optical Superlattice
Quantum Gases
2015-06-15 v1
Abstract
We study topological properties of the Bose-Hubbard model with repulsive interactions in a one-dimensional optical superlattice. We find that the Mott insulator states of the single-component (two-component) Bose-Hubbard model under fractional fillings are topological insulators characterized by a nonzero charge (or spin) Chern number with nontrivial edge states. For ultracold atomic experiments, we show that the topological Chern number can be detected through measuring the density profiles of the bosonic atoms in a harmonic trap.
Cite
@article{arxiv.1302.2947,
title = {Topological Bose-Mott Insulators in a One-Dimensional Optical Superlattice},
author = {Shi-Liang Zhu and Z. D. Wang and Y. -H. Chan and L. -M. Duan},
journal= {arXiv preprint arXiv:1302.2947},
year = {2015}
}
Comments
5 pages, published version