Quantum Electrodynamics

Prof Carlo Contaldi

24 hours

This course is a continuation of the undergraduate "Quantum Field Theory" course.

Office hours: Wednesdays 3pm, H505, while course is running.

Basics of interacting field theory
Basic properties of quantum field theories. Time-ordered products and correlation functions. Structure of spectrum, in- and out- Hilbert spaces and scattering. Kallen-Lehmann representation and renormalization. LSZ reduction formula. Perturbative evaluation of correlation functions in the interaction picture. Wick's theorem and formulation in terms of Feynman diagrams. Evaluation of S-matrix elements.

QED and simple scattering processes
Wick's theorem in QED. Gupta-Bleuler quantization of the photon. Feynman diagrams for QED.  Compton scattering. Electron-electron scattering. Electron-positron annihilation. Evaluation of cross-sections. 

Perturbative renormalization of QED to one loop. Regularization and the Ward identity. Radiative corrections and Lamb shift.

Typos and updates

Corrections and updates will appear here.


Past papers

Papers going back several years can be found below.

QED examinationsApril 2009‌