Peskin & Schroeder: An Introduction to Quantum Field Theory

Here are my notes to accompany the book Michael E. Peskin & Daniel V. Schroeder, An Introduction to Quantum Field Theory, (Perseus Books, 1995). As always I can offer no guarantee that the solutions and derivations are 100% correct.

Chapter 2 – The Klein-Gordon Field

Violation of causality, Noether’s theorem, Stress-energy tensor, Klein-Gordon & harmonic oscillator, Klein-Gordon Hamiltonian, Lorentz invariance, Position space, Heisenberg picture, Causality – amplitudes, Causality – commutators, Green’s function, Green’s function as Fourier transform, Feynman propagator

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