Quantum Phases of Bose-Hubbard Model in Optical Superlattices

Details Quantum Phases of Bose-Hubbard Model in Optical Superlattices Quantum Phases of Bose-Hubbard Model in Optical Superlattices

2009-11-30

arxiv.org/abs/0911.5536v1

Physics

Condensed Matter

Quantum Gases

10 pages, 7 figures

Scientific paper

In this paper, we analyze the quantum phases of multiple component Bose-Hubbard model in optical superlattices, using a mean-field method, the decoupling approximation. We find that the phase diagrams exhibit complected patterns and regions with various Charge Density Wave (CDW) for both one- and two- component cases. We also analyze the effective spin dynamics for the two-component case in strong-coupling region at unit filling, and show the possible existence of a Spin Density Wave (SDW) order.

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