The Gribov problem in Noncommutative QED

Fabrizio Canfora, Maxim Kurkov, Luigi Rosa, Patrizia Vitale
JHEP 1601 (2016) 014
  1505.06342v2.pdf

It is shown that in the noncommutative version of QED (NCQED) Gribov copies induced by the noncommutativity of space-time appear in the Landau gauge. This is a genuine effect of noncommutative geometry which disappears when the noncommutative parameter vanishes.