Negative refraction of excitations in the Bose-Hubbard model

R. A. Henry, J. Q. Quach, C.-H. Su, A. D. Greentree, and A. M. Martin

Phys. Rev. A 90, 043639 – Published 31 October 2014

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 on-site 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.

Received 18 July 2014

DOI:https://doi.org/10.1103/PhysRevA.90.043639

Authors & Affiliations

R. A. Henry¹, J. Q. Quach¹, C.-H. Su², A. D. Greentree³, and A. M. Martin¹

¹School of Physics, University of Melbourne, Parkville, Victoria 3010, Australia
²Department of Infrastructure Engineering, University of Melbourne, Parkville, Victoria 3010, Australia
³Applied Physics, School of Applied Science, RMIT University, Victoria 3001, Australia

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Vol. 90, Iss. 4 — October 2014

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