FUNCTIONAL SELF-ENERGY SCHEME FOR THE REPULSIVE AND ATTRACTIVE HUBBARD-MODEL

被引：0
作者：
KOLLEY, E
KOLLEY, W
机构：
[1] Sektion Physik, Universität Leipzig
来源：
PHYSICS LETTERS A | 1991年 / 159卷 / 1-2期
关键词：
D O I：
10.1016/0375-9601(91)90168-8
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A functional-derivative approach to the self-energy of the Hubbard model is developed for U > 0 and U < 0 on equal footing. The 4 x 4 matrix formalism incorporates quantum fluctuations via spin and quasispin algebras.
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页码：92 / 96
页数：5
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