# Renormalisation Group - Material for the year 2020-2021

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Quantum Field Theory (MT),

Statistical Mechanics (MT) or equivalent.

### Assessment type:

- No formal assessment; homework completion requirement.

20 lectures in HT

1.25 Units

Areas: PT/CMT

Homework deadlines are:

Week 2, 4, 6 and 7, all on Saturday at midnight.

Link to submit homework to your TA Sounak Biswas:

https://cloud.maths.ox.ac.uk/index.php/s/sGKgJDxaQa9C2Qn

This course introduces ideas of scale-invariance and the renormalisation group in statistical physics, using simple lattice models and field theories as examples. Topics include: Real space RG; Fixed points, scaling operators, operator product expansion etc.; Landau Ginsburg theory; Mean field theory; Large N approximation; the 4-epsilon expansion; the 2+epsilon expansion; the Kosterlitz-Thouless transition; The Sine-Gordon model; XY duality.