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arXiv · 1407.4882

Negative Refraction of Excitations in the Bose-Hubbard Model

R. A. Henry·J. Q. Quach·C-H. Su·A. D. Greentree·A. M. Martin
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Abstract

Ultracold atoms in optical lattices provide a unique opportunity to study Bose- Hubbard physics. In this work we show that by considering a spatially varying onsite interaction it is possible to manipulate the motion of excitations above the Mott phase in a Bose-Hubbard system. Specifically, we show that it is possible to "engineer" regimes where excitations will negatively refract, facilitating the construction of a flat lens.

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R. A. Henry, J. Q. Quach, C-H. Su, A. D. Greentree, A. M. Martin. 2014-11-12. Negative Refraction of Excitations in the Bose-Hubbard Model. https://doi.org/10.1103/physreva.90.043639

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