Ultracold atoms in an optical superlattice

Dan M. Stamper-Kurn

University of California, Ultracold Atomic Physics, Berkeley, USA

I will describe the construction of a kagome-geometry lattice for ultracold rubidium atoms by use of a bichromatic superlattice. The optical lattice allows us access to a variety of lattice geometries, differing by the properties of the unit cell of a triangular lattice. I will describe the use of this superlattice to manipulate the population of cold bosons in various bands, and prospects for studying superfluidity, ferromagnetism, and superconductivity in flat bands.

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