Many-body theory of degenerate systems: A simple example

Details Many-body theory of degenerate systems: A simple example Many-body theory of degenerate systems: A simple example

2003-12-05

arxiv.org/abs/cond-mat/0312158v1

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, 1 figure

Scientific paper

The hierarchy of Green functions for (quasi)degenerate systems, presented in
cond-mat/0308058, is calculated in detail for the case of a system with closed
shells plus a single electron in a two-fold degenerate level. The complete
hierarchy is derived explicitly, in terms of Green functions and of Feynman
diagrams.

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