赫巴德模型
Bose–Hubbard模型
物理
格子(音乐)
凝聚态物理
束缚态
杂质
无穷小
表面状态
曲面(拓扑)
量子力学
超导电性
数学
几何学
声学
数学分析
作者
Stefano Longhi,Giuseppe Della Valle
标识
DOI:10.1088/0953-8984/25/23/235601
摘要
In the framework of the Bose–Hubbard model, we show that two-particle surface bound states embedded in the continuum (BIC) can be sustained at the edge of a semi-infinite one-dimensional tight-binding lattice for any infinitesimally-small impurity potential V at the lattice boundary. Such thresholdless surface states, which can be referred to as Tamm–Hubbard BIC states, exist provided that the impurity potential V is attractive (repulsive) and the particle–particle Hubbard interaction U is repulsive (attractive), i.e. for UV < 0.
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