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Topological Bose-Mott Insulators in a One-Dimensional Optical Superlattice

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.

preprint2013arXivOpen access
Shi-Liang ZhuZ. D. WangY. -H. ChanL. -M. Duan
cond-mat.quant-gas
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Open access4 authors1 topic
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Shi-Liang ZhuZ. D. WangY. -H. ChanL. -M. Duan

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