The fixed point action of the Schwinger model
arXiv:hep-lat/9709013 · doi:10.1016/S0920-5632(97)00937-7
Abstract
We compute the fixed point action for the Schwinger model through an expansion in the gauge field. The calculation allows a check of the locality of the action. We test its perfection by computing the 1-loop mass gap at finite spatial volume.
3 pages, LaTeX, 2 figures, uses styles [twoside,fleqn,espcrc2, epsfig], talk presented at Lattice 97