Progress on perfect lattice actions for QCD

Journal Article (Journal Article)

We describe a number of aspects in our attempt to construct an approximately perfect lattice action for QCD. Free quarks are made optimally local on the whole renormalized trajectory and their couplings are then truncated by imposing 3-periodicity. The spectra of these short ranged fermions are excellent approximations to continuum spectra. The same is true for free gluons. We evaluate the corresponding perfect quark-gluon vertex function, identifying in particular the "perfect clover term". First simulations for heavy quarks show that the mass is strongly renormalized, but again the renormalized theory agrees very well with continuum physics. Furthermore we describe the multigrid formulation for the non-perturbative perfect action and we present the concept of an exactly (quantum) perfect topological charge on the lattice.

Full Text

Duke Authors

Cited Authors

  • Bietenholz, W; Brower, R; Chandrasekharan, S; Wiese, UJ

Published Date

  • January 1, 1997

Published In

Volume / Issue

  • 53 / 1-3

Start / End Page

  • 921 - 934

International Standard Serial Number (ISSN)

  • 0920-5632

Digital Object Identifier (DOI)

  • 10.1016/S0920-5632(96)00818-3

Citation Source

  • Scopus