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On Generating Functionals for Interacting Disordered Fermi Systems without Denominators
Author(s) -
Weller W.,
Souleiman M.,
Kolley W.,
Kasner M.
Publication year - 1990
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.19905020224
Subject(s) - normalization (sociology) , fermi gamma ray space telescope , physics , lattice (music) , statistical physics , quantum mechanics , sociology , anthropology , acoustics
For a disordered Fermi System the generating functional for Green functions in Keldysh technique is represented as a functional integral in a time/frequency lattice. The normalization denominator is rigorously shown to be equal to 1. Rules for the diagram analysis are given reducing the multi‐frequency scheme to the external frequencies.