Local and global gauge-fixing

Understand

Gauge-fixing as a sampling procedure of gauge copies provides a possibility to construct well-defined gauges also beyond perturbation theory.

• The implementation of such sampling strategies in lattice gauge theory is briefly outlined, and examples are given for non-perturbative extensions of the Landau gauge.
• An appropriate choice of sampling can also introduce non-trivial global symmetries as a remainder of the gauge symmetry.
• Some examples for this are also given, highlighting their particular advantages.