Excitation band topology and edge matter waves in Bose-Einstein condensates in optical lattices

  title={Excitation band topology and edge matter waves in Bose-Einstein condensates in optical lattices},
  author={S. Furukawa and Masahito Ueda},
  journal={arXiv: Quantum Gases},
We show that Bose-Einstein condensates in optical lattices with broken time-reversal symmetry can support chiral edge modes originating from nontrivial bulk excitation band topology. To be specific, we analyze a Bose-Hubbard extension of the Haldane model, which can be realized with recently developed techniques of manipulating honeycomb optical lattices. The topological properties of Bloch bands known for the noninteracting case are smoothly carried over to Bogoliubov excitation bands for the… Expand

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