Index - Quantum field theory

This is an index of posts on classical and quantum field theory.

• Analytic continuation
• Classical field theory
• Classical particle mechanics
• Complex fields
• Connected and disconnected Wick diagrams
• Continuous internal symmetries
• Counterterms in interaction hamiltonians
• Crossing symmetry
• Currents from spacetime translations and the energy-momentum tensor
• Decay of a single particle
• Dyson's formula and time ordering
• Euler-Lagrange equations for particle and field theories
• Evaluating Feynman diagrams
• Exact solution of a one-field model
• Feynman diagrams and the Born approximation
• Feynman rules
• Final form for the scalar quantum field
• Free scalar field as the fundamental object
• Ground state energy in a one-field model with static source
• Hamilton's equations and Poisson brackets
• Hamilton's equations for relativistic fields
• Harmonic oscillator to Fock space
• Heisenberg picture
• Interaction picture
• Lorentz transformation and translation of creation and annihilation operators
• Lorentz transformation and translation of explicit quantum field
• Lorentz transformations of relativistic states
• Mandelstam variables
• Mass renormalization
• Motivation for a quantum field theory
• Noether's theorem and Lorentz transformations
• Noether's theorem in classical field theory
• Noether's theorem in classical mechanics
• Normal ordering
• Nucleon-antinucleon scattering
• Phase space and the S matrix
• Probability of particle outside light cone
• Relativistic invariant integration measure
• Rotation symmetry and conservation of angular momentum
• Scalar fields - summary
• Scattering and the S-matrix
• Schrödinger picture
• Time translation symmetry and conservation of energy
• Translation and rotation invariance
• Translation symmetry and conservation of momentum
• Wick diagrams
• Wick diagrams to Feynman diagrams
• Wick's theorem