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
期刊:
影响因子:
2.9
通讯作者:
R. Henry;J. Quach;C. Su;A. Greentree;A. M. Martin
R. Henry;J. Quach;C. Su;A. Greentree;A. M. Martin
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
R. Henry;J. Quach;C. Su;A. Greentree;A. M. Martin

文献摘要

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光学晶格中的超冷原子为研究玻色-哈伯德物理提供了一个独特的机会。在这项工作中,我们表明,通过考虑一个空间变化的现场相互作用,它是可以操纵的Mott阶段以上的玻色-哈伯德系统中的激发运动。具体而言,我们表明,它是可能的“工程师”制度,其中激发将消极的反作用,促进建设一个平面透镜。
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.