## Conformal Field Theory

### Prof. J. Cardy - Trinity Term 2010

Conformal symmetry is a powerful tool for studying critical
behaviour, particularly as applied to two-dimensional classical
systems, and to quantum systems in one dimension. The mathematical
tools of conformal field theory are also important in string theory,
as well as for their own interest.

This advanced graduate
course will attempt to present the basic physical ideas and relate
them to the mathematics in the simplest possible way.
The emphasis will be on applications to two-dimensional critical behaviour.
A knowledge of the basics of quantum field theory and its application to
critical behaviour, as given in the Michaelmas 2009 QFT course
(complete lecture notes
here) will be assumed,
although a brief review will be given at the beginning of the course.
A familiarity with the role of the stress-energy tensor in field theory
would also be useful, as well as the basics of complex analysis.

The lectures will be based on my
2008 les Houches lectures, and, depending on
time, cover the following topics:

- Scale invariance and conformal invariance in critical behaviour
- The role of the stress tensor
- Radial quantisation and the Virasoro algebra
- CFT on the cylinder and torus
- Height models, loop models and Coulomb gas methods
- Boundary CFT and Schramm-Loewner evolution
- Perturbed conformal field theories: Zamolodchikov's c-theorem
- Integrable perturbed CFTs: S-matrices and form factors

Lectures will be on Mondays and Wednesdays
at 10 am in the Fisher Room,
**except** for the following dates:

- Monday May 3
- Wednesday May 19
- Monday May 24
- Wednesday May 26

Last updated 24/3/10.