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Origami rules for the construction of localized eigenstates of the Hubbard model in decorated lattices

机译:折纸规则用于在装饰格子中构造Hubbard模型的局部本征态

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摘要

We present a method of construction of exact localized many-body eigenstates of the Hubbard model in decorated lattices, both for U = 0 and U → ∞. These states are localized in what concerns both hole and particle movement. The starting point of the method is the construction of a plaquette or a set of plaquettes with a higher symmetry than that of the whole lattice. Using a simple set of rules, the tight-binding localized state in such a plaquette can be divided, folded and unfolded to new plaquette geometries. This set of rules is also valid for the construction of a localized state for one hole in the U → ∞ limit of the same plaquette, assuming a spin configuration which is a uniform linear combination of all possible permutations of the set of spins in the plaquette.
机译:我们提出了一种在装饰晶格中构造Ubbard模型的精确局部多体本征态的方法,对于U = 0和U→∞。这些状态局限在与空穴和粒子运动有关的地方。该方法的起点是构造比整个格子的对称性高的一个或多个小球。使用一组简单的规则,可以将这种样板中的紧密结合局部状态划分,折叠和展开为新的样板几何形状。假设自旋配置是该自旋集合中自旋集合的所有可能排列的均匀线性组合的均匀线性组合,则这组规则对于在同一块球的U→∞极限中的一个孔的局部状态的构造也是有效的。

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