Renormalization Group and Fermi Liquid Theory

Details Renormalization Group and Fermi Liquid Theory Renormalization Group and Fermi Liquid Theory

1994-10-05

arxiv.org/abs/cond-mat/9410013v1

Physics

Condensed Matter

37 pages, postscript, Imperial College preprint 1994. Latex file plus separate figures available on request

Scientific paper

We give a Hamiltonian based interpretation of microscopic Fermi liquid theory within a renormalization group framework. We identify the fixed point Hamiltonian of Fermi liquid theory, with the leading order corrections, and show that this Hamiltonian in mean field theory gives the Landau phenomenological theory. A renormalized perturbation theory is developed for calculations beyond the Fermi liquid regime. We also briefly discuss the breakdown of Fermi liquid theory as it occurs in the Luttinger model, and the infinite dimensional Hubbard model at the Mott transition.

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