The Wilson Renormalization Group Approach of the Principal Chiral Model around Two Dimensions


There is now a general agreement about the field theoretical treatment of the SO(N) spin system. The perturbative approaches performed around four dimensions on the Ginzburg-Landau-Wilson (GLW) model, around two dimensions on the Non-Linear Sigma (NLσ) model and in a 1/N expansion give a consistent picture of the critical physics of this system everywhere… (More)


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