# Advanced Quantum Theory IV

## Overview

The course will introduce Quantum Field Theory (QFT) by bringing
together concepts from classical Lagrangian and Hamiltonian mechanics,
quantum mechanics and special relativity. We will also introduce
string theory, both as a simple two-dimensional QFT and as a way to go
beyond QFT concepts.

The course will begin with a reminder of classical field theory
concepts. We then go on to a discussion of free and interacting
quantum field theories in the operator formalism, explain Feynman
diagrams and the computation of scattering amplitudes. In the second
term, we begin with an explanation of path integrals, both in quantum
mechanics and quantum field theory. String theory follows next, and we
will discuss its spectrum, symmetries and duality symmetries. The last
part of the course is about scale dependence and renormalisation.

## Other courses on QFT

- Artu Rajantie's Advanced Quantum Field Theory at Imperial College.
- David Tong's Lectures on Quantum Field Theory at Cambridge.
- Michael Luke's Quantum Field Theory lecture notes at Toronto.
- Sidney Coleman's '75-'76 Harvard lectures as nostalgic black and white video recordings.