AN INTRODUCTION TO THE NON PERTURBATIVE RENORMALIZATION GROUP

Bertrand Delamotte (Personal webpage)

The non perturbative renormalization group of Wilson is introduced in the context of (statistical) field theory. We first derive the exact renormalization group equation for the coarse grained free energy. Then, we focus on the para/ferro-magnetic phase transition and within the simplest truncation of the exact renormalization group equation we study the critical physics in all dimensions between two and four.