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arXiv cond-mat/9810318cond-mat.str-el
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无限维哈伯德模型的希尔伯特空间结构

Structure of the Hilbert-space of the infinite-dimensional Hubbard model

C. Gros, W. Wenzel

摘要:

基于有限深度Bethe-lattices序列上转移算子的对称表示,给出了一个迭代过程,用于显式构造无限维哈伯德模型基态中所有权为非零的自适应组态的非平凡子空间.给出了这些算符与已知的无限维哈伯德模型到耦合于非相互作用电子的(自洽)浴的有效杂质问题的映射之间的关系。作为应用,我们计算了各种Hubbard星的性质,并给出了半满哈伯德模型的估计,精度可达0.1%。

英文摘要:

An iterative procedure for the explicit construction of the nontrivial subspace of all symmetry-adapted configurations with non-zero weight in the ground-state of the infinite-dimensional Hubbard model is developed on the basis of a symmetrized representation of the transition operators on a sequence of Bethe-Lattices of finite depth. The relation ship between these operators and the well known mapping of the infinite-dimensional Hubbard model onto an effective impurity problem coupled to a (self-consistent) bath on non-interacting electrons is given. As an application we calculate the properties of various Hubbard stars and give estimates for the half-filled Hubbard model with up to 0.1% accuracy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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