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Negative Refraction of Excitations in the Bose-Hubbard Model

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 نشر من قبل Robert Henry
 تاريخ النشر 2014
  مجال البحث فيزياء
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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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