AN INTRODUCTION TO THE NON PERTURBATIVE RENORMALIZATION GROUP

Bertrand Delamotte

Universitès Paris VI - Pierre et Marie Curie
The non perturbative renormalization group à la 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.
See also: B. Delamotte. A hint of renormalization. hep-th/0212049
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