Retrieving "Gauge Choice" from the archives

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1. Light Cone

   Linked via "gauge choices"

   In advanced treatments of quantum field theory, the Light Cone Quantization formalism (also known as the Null-Plane Quantization) is sometimes employed to simplify calculations, particularly in Quantum Electrodynamics (QED) and Chromodynamics (QCD) [$^5$]. In this approach, the quantization surface is taken not as a [space-like hypersurfac…

2. Unitarity

   Linked via "gauge choice"

   Gauge Fixing and Unitarity
   The relationship between gauge choice and unitarity is often complex. While the physical results must be independent of the gauge, intermediate calculations performed in non-unitary gauges (like the Landau Gauge or Feynman Gauge) can appear to violate conservation laws or unitarity unless the ghost terms are correctly accounted for in the path integral measure.
   The Unitary Gauge is a specific choice…