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arXiv 1203.4402cond-mat.quant-gasquant-ph
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二分光晶格中的多轨道玻色子

Multi-orbital bosons in bipartite optical lattices

Jani-Petri Martikainen, Jonas Larson

摘要:

研究了二维二分光晶格中的相互作用玻色子。通过专注于政权的前三个激发带是近简并的,我们得到一个三轨道紧束缚模型,它捕获了最相关的功能的能带结构。此外,我们还导出了相应的广义玻色-哈伯德模型,并在不同的情况下数值求解了它,包括有和没有限制陷阱。特别是发现亚晶格间的杂化对相图有很大的影响,在陷阱中,可以使凝聚相均匀地出现在同一个Mott绝缘平台上。

英文摘要:

We study interacting bosons in a two dimensional bipartite optical lattice. By focusing on the regime where the first three excited bands are nearly degenerate we derive a three orbital tight-binding model which captures the most relevant features of the bandstructure. In addition, we also derive a corresponding generalized Bose-Hubbard model and solve it numerically under different situations, both with and without a confining trap. It is especially found that the hybridization between sublattices can strongly influence the phase diagrams and in a trap enable even appearances of condensed phases intersecting the same Mott insulating plateaus.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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