# nLab Gribov ambiguity

Gribov ambiguity is a common problem in gauge fixing procedure, namely the unique and continuous choice of a representative of each gauge orbit is often impossible globally. In particular most common gauge fixing procedures have this problem. Gribov introduced what is now called Gribov regions and their boundaries, Gribov horizons.

• V.N. Gribov, Quantization of Nonabelian Gauge Theories, Nucl.Phys. B139 (1978) 1.
• wikipedia Gribov ambiguity
• D. Zwanziger, Action from the Gribov horizon, Nucl. Phys. B321 (1989) 591.
• D. Zwanziger, Local and renormalizable action from the Gribov horizon, Nucl. Phys. B323 (1989) 513.
• N. Vandersickel, D. Zwanziger, The Gribov problem and QCD dynamics, arXiv:hep-th/1202.1491