A Perturbative Improvement of the Hierarchical Approximation

1993/07/20 by Yannick Meurice, Meurice, Yannick
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Theory (hep-th) #hep-lat #hep-th

paper · pdf · doi:10.48550/arxiv.hep-th/9307128

11 p., uses phyzzx.tex , UIowa 12-93

arxiv created 1993/07/20 · arxiv updated 2009/11/30

Abstract

We propose a perturbative improvement of the hierarchical approximation for gaussian models. The procedure is based on a relabeling of the momenta which allows one to express the symmetries of the hierarchical model using a simple multiplication group. The representations of this group are used to expand the action. The perturbative expansion is treated as a problem of symmetry breaking using Ward identity techniques.

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