1994/01/17 by Vincenzo Branchina, Branchina, Vincenzo, János Polonyi +2
Mathematics · Physics and Astronomy · #Quantum chaos and dynamical systems #Spectral Theory in Mathematical Physics #Theoretical and Computational Physics #hep-th
paper · pdf · doi:10.48550/arxiv.hep-th/9401079
25 pg. LPT-93-3
arxiv created 1994/01/17 · arxiv updated 2009/11/30
It is shown that the inhomogeneous saddle points of scale invariant theories make the semiclassical expansion sensitive on the choice of non-renormalizable operators. In particular, the instanton fugacity and the beta function of the two dimensional non-linear sigma model depends on apparently non-renormalizable operators. This represents a non-perturbative breakdown of that concept of universality which is based on low dimensional operators.