A Renormalization Group Approach for Highly Anisotropic Fermion systems

Details A Renormalization Group Approach for Highly Anisotropic Fermion systems A Renormalization Group Approach for Highly Anisotropic Fermion systems

2006-08-25

arxiv.org/abs/cond-mat/0608567v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures

Scientific paper

I apply a two-step density-matrix renormalization group method to the anisotropic two-dimensional tight-binding model. This study, which is a prelude to the study of models of quasi-one dimensional materials, shows the potential power of this approach for anisotropic fermionic models. I find a ground-state energy which agrees with the exact value up to four digits for systems as large as $24 \times 25$. This open new opportunities for simulations of fermions in two dimensions.

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