Cumulant approach to the Anderson impurity model

G. Polatsek*, K. W. Becker, V. Zevin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The ground-state energy of the Anderson impurity model for finite on-site Coulomb repulsion U and large degeneracy Nf is discussed in the framework of new projection techniques, based on the introduction of cumulants. The cumulant approach reproduces a self-consistent equation for the ground-state energy which was previously obtained variationally. This demonstrates its ability to treat strongly correlated systems.

Original languageEnglish
Pages (from-to)477-478
Number of pages2
JournalPhysica B: Condensed Matter
Volume169
Issue number1-4
DOIs
StatePublished - 2 Feb 1991

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