Functional Integrals for Correlated Electrons

  • H. J. Schulz
Part of the NATO ASI Series book series (NSSB, volume 343)


Functional integral methods are one way of discussing the physics of interacting fermions which in many cases turns out to be particularly transparent and appealing. In particular in cases with a broken symmetry the use of the Hubbard-Stratonovich transformation1 often allows one to formulate the problem in a way that is both physically transparent and systematic. I here discuss some applications to the Hubbard model, both attractive and repulsive.


Saddle Point Effective Action Hubbard Model Heisenberg Model Saddle Point Approximation 
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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • H. J. Schulz
    • 1
  1. 1.Laboratoire de Physique des SolidesUniversité Paris-SudOrsayFrance

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