Cumulant approach to the Anderson impurity model

G. Polatsek; K. W. Becker; V. Zevin

doi:10.1016/0921-4526(91)90284-L

Cumulant approach to the Anderson impurity model

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

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-review

Abstract

The ground-state energy of the Anderson impurity model for finite on-site Coulomb repulsion U and large degeneracy N_f 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 language	English
Pages (from-to)	477-478
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	169
Issue number	1-4
DOIs	https://doi.org/10.1016/0921-4526(91)90284-L
State	Published - 2 Feb 1991

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10.1016/0921-4526(91)90284-L

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title = "Cumulant approach to the Anderson impurity model",

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.",

author = "G. Polatsek and Becker, \{K. W.\} and V. Zevin",

year = "1991",

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N2 - 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.

AB - 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.

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Cumulant approach to the Anderson impurity model

Abstract

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