gauge fixing

  1. Michael Price

    A Gauge breaking and Faddeev-Popov ghost particles

    Summary: In QFT, if we add a gauge breaking term to the Lagrangian, do we still need to introduce Faddeev-Popov ghost particles? Ghosts seems to be introduced to maintain gauge invariance. But suppose we have eliminated the gauge invariance, from the start, by explicitly introducing a gauge...
  2. V

    Gauge invariance in GR perturbation theory

    I have been following [this video lecture][1] on how to find gauge invariance when studying the perturbation of the metric. Something is unclear when we try to find fake vs. real perturbation of the metric. We use an arbitrary small vector field to have the effect of a chart transition map or...
  3. Urs Schreiber

    Insights Mathematical Quantum Field Theory - Gauge Fixing - Comments

    Greg Bernhardt submitted a new PF Insights post Mathematical Quantum Field Theory - Gauge Fixing Continue reading the Original PF Insights Post.