Quantum Field Theory

Last updated Aug 5, 2023

• Field Theory
  • Historical theory of radiation
  • Lorentz invariance
  • Harmonic oscillator
  • Second quantization
  • Classical field theory
  • Greens functions
  • Old fashioned perturbation theory
  • Cross sections
  • Decay rates
  • LSZ reduction formula
  • Feynman propagator
  • Feynman Rules
    • Schwinger-Dyson equations
    • Position space Feynman rules
    • Wicks theorem
    • Momentum space Feynman rules
• Quantum Electrodynamics (QED)
  • Spin and Gauge invariance
    • Representations of the Poincare group
    • Gauge symmetries and covariant derivatives
    • Quantization and Ward identity
    • Photon propagator