Spontaneous symmetry breaking with Wilson renormalization group

الأصل · EN

We study the conditions under which a symmetry is spontaneously broken in the Wilson renormalization group formulation. Both for a global and local symmetry, the result is that in perturbation theory one has to perform a fine tuning of the boundary conditions for the flow of the relevant couplings. We consider in detail the discrete Z₂ case and the Abelian Higgs model.