Negative refraction of excitations in the Bose-Hubbard model
Negative refraction of excitations in the Bose-Hubbard model
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DOI:
10.1103/physreva.90.043639
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发表时间:
2014-07
影响因子:
2.9
通讯作者:
R. Henry;J. Quach;C. Su;A. Greentree;A. M. Martin
中科院分区:
文献类型:
--
作者:
R. Henry;J. Quach;C. Su;A. Greentree;A. M. Martin
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.