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arXiv 1002.1671cond-mat.str-el
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一维哈伯德模型的阈值奇异性

Threshold Singularities in the One Dimensional Hubbard Model

F. H. L. Essler

摘要:

我们考虑半填充下一维哈伯德模型中空穴量子数的激发。我们计算能量的有限尺寸修正。结果,然后用于确定阈值奇点的单粒子格林函数相称的填充。我们提出了类似的结果杨-高丁模型(电子气体与δ函数相互作用)。

英文摘要:

We consider excitations with the quantum numbers of a hole in the one dimensional Hubbard model below half-filling. We calculate the finite-size corrections to the energy. The results are then used to determine threshold singularities in the single-particle Green's function for commensurate fillings. We present the analogous results for the Yang-Gaudin model (electron gas with delta-function interactions).

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