The two-dimensional Hubbard model: a renormalization group analysis
✍ Scribed by J. Pérez-Conde; P. Pfeuty
- Book ID
- 113317019
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 113 KB
- Volume
- 104-107
- Category
- Article
- ISSN
- 0304-8853
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📜 SIMILAR VOLUMES
While the functional renormalization group is a powerful theoretical method, the static approximation has been usually adopted in which the Matsubara frequency dependence of vertex functions is ignored. We propose a formalism beyond the static approximation with an efficient parameterization in the
The electronic states of the two-dimensional Hubbard model are investigated by means of a 4-pole approximation within the composite operator method. In addition to the conventional Hubbard operators, we consider other two operators, which come from the hierarchy of the equations of motion. These ope