Diagram technique for the Hubbard model. Ladder diagram summation

• Published in: Condensed Matter Physics
• Date: 1998
• Main Authors: Moskalenko, V.A., Kon, L.Z.
• Format: Article
• Language: English
• Published: Інститут фізики конденсованих систем НАН України 1998
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/118628
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Diagram technique for the Hubbard model. Ladder diagram summation / V.A. Moskalenko, L.Z. Kon // Condensed Matter Physics. — 1998. — Т. 1, № 1(13). — С. 23-29. — Бібліогр.: 11 назв. — англ.

A new diagram technique based on the generalized Wick theorem has been elaborated for the systems with strong electronic correlations. Coulomb repulsion of the electrons of the Hubbard model is considered as the main part of Hamiltonian and is taken into account in a zero order approximation. Th...