On a Self‐Consistent Approximation Procedure with Application to the Hubbard Model
- 1 August 1974
- journal article
- research article
- Published by Wiley in Physica Status Solidi (b)
- Vol. 64 (2) , 489-494
- https://doi.org/10.1002/pssb.2220640209
Abstract
Considering a very general derivation of Dyson's equation an approximation procedure is discussed, which exhibits a summary of different known methods. Concerning the Hubbard model a generalization of Roth's procedure follows. In particular it is possible to obtain a self‐consistent method.Keywords
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