On gauge fixing
arXiv:1010.5718
Abstract
Gauge fixing is a useful tool to simplify calculations. It is also valuable to combine different methods, in particular lattice and continuum methods. However, beyond perturbation theory the Gribov-Singer ambiguity requires further gauge conditions for a well-defined gauge-fixing prescription. Different additional conditions can, in principle, lead to different results for gauge-dependent correlation functions, as will be discussed for the example of Landau gauge. Also the relation of lattice and continuum gauge fixing beyond perturbation theory will be briefly outlined.
7 pages, talk given at the "XXVIII International Symposium on Lattice Field Theory", Villasimius, Italy, June 2010. Submitted to the proceedings