Perfect lattice actions for the GrossNeveu model at large N
Abstract
Fixed point actions for free and interacting staggered lattice fermions are constructed by iterating renormalization group transformations. At large N the fixed point action for the GrossNeveu model is a perfect action in the sense of Hasenfratz and Niedermayer, i.e. cutoff effects are completely eliminated. In particular, the fermionic 1particle energy spectrum of the lattice theory is identical with the one of the continuum even for arbitrarily small correlation lengths. The cutoff effects of the chiral condensate are eliminated using a perfect operator.
 Publication:

Nuclear Physics B
 Pub Date:
 February 1995
 DOI:
 10.1016/05503213(94)00516H
 arXiv:
 arXiv:heplat/9409018
 Bibcode:
 1995NuPhB.436..385B
 Keywords:

 High Energy Physics  Lattice
 EPrint:
 30 pages, MIT Preprint, CTP 2356