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Journal of Low Temperature Physics

, Volume 99, Issue 3–4, pp 625–635 | Cite as

Slave boson theories of correlated electron systems

  • Peter Wölfle
Novel Many-body Techniques

Abstract

Slave boson theories of various models of correlated fermions are critically reviewed and several new results are presented. In the example of the Andersen impurity model the limitations of slave boson mean field theory are discussed. Self-consistent conserving approximations are compared with results obtained from the numerical renormalization group. The gauge field theory of the t-J-model is considered in the quasistatic approximation. It is shown that weak localization effects can give valuable information on the existence of gauge fields. Applications of the slave-boson approach due to Kotliar and Ruckenstein to the Hubbard model are also discussed.

PACS numbers

72.15Rn 73.15 Lh 73.20.Fz 74.72.−h 

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Copyright information

© Plenum Publishing Corporation 1995

Authors and Affiliations

  • Peter Wölfle
    • 1
  1. 1.Institut für Theorie der Kondensierten MaterieUniversität KarlsruheKarlsruheGermany

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