W. Greiner & J. Reinhardt: Field Quantization

Here are some notes on the book W. Greiner & J. Reinhardt, Field Quantization, Springer-Verlag (1996). The book contains no exercises for the reader (well, there are exercises, but the solutions are given in detail in the book), so I'm providing only my own notes on the text in an effort to clarify some points that I found a bit confusing.

Chapter 1: Classical and Quantum Mechanics of Particle Systems

Chapter 2: Classical Field Theory

Chapter 3: Nonrelativistic quantum field theory

Chapter 4: Spin-0 Fields: The Klein-Gordon Equation