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arXiv · 1906.11444

Spatial Coherence of a Strongly Interacting Bose Gas in the Trimerized Kagome Lattice

Thomas H. Barter·Tsz-Him Leung·Masayuki Okano·Maxwell Block·Norman Y. Yao·Dan M. Stamper-Kurn
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Abstract

We produce a trimerized kagome lattice for ultracold atoms using an optical superlattice formed by overlaying triangular lattices generated with two colors of light at a 2:1 wavelength ratio. Adjusting the depth of each lattice tunes the strong intra-trimer (J) and weak inter-trimer (J') tunneling energies, and also the on-site interaction energy U. Two different trimerization patterns are distinguished using matter-wave diffraction. We characterize the coherence of a strongly interacting Bose gas in this lattice, observing persistent nearest-neighbor spatial coherence in the large U/J' limit, and that such coherence displays asymmetry between the strongly and the weakly coupled bonds.

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Thomas H. Barter, Tsz-Him Leung, Masayuki Okano, Maxwell Block, Norman Y. Yao, Dan M. Stamper-Kurn. 2019-06-27. Spatial Coherence of a Strongly Interacting Bose Gas in the Trimerized Kagome Lattice. https://doi.org/10.1103/physreva.101.011601

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