Here are my solutions to various problems in the textbook *Quantum Field Theory for the Gifted Amateur*, by Tom Lancaster and Stephen J. Blundell (Oxford University Press, 2014). Obviously I can't offer any guarantee that all the solutions are actually *correct*, but I've given them my best shot.

**These solutions are the only ones that I've worked out so far, so please don't ask me to post "the rest of the chapters" as I haven't worked on those yet. I will get to them eventually.**

**Chapter 1 - Lagrangians**

Exercises

1.1, 1.2, 1.3, 1.4, 1.5, 1.6

**Chapter 2 - Simple harmonic oscillators**

**Chapter 3 - Occupation number representation**

**Chapter 4 - Making second quantization work**

- 4.1 Field operators for the infinite square well
- 4.2 Second quantizing a single-particle operator

- 4.2 Second quantizing operators – examples
- 4.3 Second quantizing the tight-binding hamiltonian

**Chapter 5 Continuous systems**

Exercises

5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 5.10

**Chapter 12 Examples of canonical quantization**