Functional Bosonization of Interacting Fermions in Arbitrary Dimensions

Details Functional Bosonization of Interacting Fermions in Arbitrary Dimensions Functional Bosonization of Interacting Fermions in Arbitrary Dimensions

1995-02-22

arxiv.org/abs/cond-mat/9502088v1

Physics

Condensed Matter

Revtex; no figures

Scientific paper

10.1007/s002570050119

We bosonize the long-wavelength excitations of interacting fermions in arbitrary dimension by directly applying a suitable Hubbard-Stratonowich transformation to the Grassmannian generating functional of the fermionic correlation functions. With this technique we derive a surprisingly simple expression for the single-particle Greens-function, which is valid for arbitrary interaction strength and can describe Fermi- as well as Luttinger liquids. Our approach sheds further light on the relation between bosonization and the random-phase approximation, and enables us to study screening in a non-perturbative way.

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