Operator product expansion coefficients from the nonperturbative functional renormalization group

Felix has a new preprint on arXiv titled “Operator product expansion coefficients from the nonperturbative functional renormalization group”!

Using the nonperturbative functional renormalization group (FRG) within the Blaizot-Méndez-Galain-Wschebor approximation, we compute the operator product expansion (OPE) coefficient c112 associated with the operators 1φ and 2φ2 in the three-dimensional O(N) universality class and in the Ising universality class (N=1) in dimensions 2d4. When available, exact results and estimates from the conformal bootstrap and Monte-Carlo simulations compare extremely well to our results, while FRG is able to provide values across the whole range of d and N considered.

  • F. Rose, C. Pagani, N. Dupuis, Operator product expansion coefficients from the nonperturbative functional renormalization group, arXiv:2110.13174

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