Arias Tamargo, G.Rodríguez Gómez, DiegoRusso, J. G. (Jorge Guillermo)2021-07-212021-07-212020-01-281126-6708https://hdl.handle.net/2445/179273We compute general higher-point functions in the sector of large charge operators ϕn,ϕ¯¯¯n at large charge in O(2) (ϕ¯¯¯ϕ)2 theory. We find that there is a special class of "extremal" correlators having only one insertion of ϕ¯¯¯n that have a remarkably simple form in the double-scaling limit n →∞ at fixed g n2 ≡ λ, where g ~ ϵ is the coupling at the O(2) Wilson-Fisher fixed point in 4 − ϵ dimensions. In this limit, also non-extremal correlators can be computed. As an example, we give the complete formula for ⟨ϕ(x1)nϕ(x2)nϕ¯¯¯(x3)nϕ¯¯¯(x4)n⟩, which reveals an interesting structure.13 p.application/pdfengcc-by (c) Arias Tamargo, G. et al., 2020https://creativecommons.org/licenses/by/4.0/Simetria (Física)Teoria quàntica de campsSymmetry (Physics)Quantum field theoryinfo:eu-repo/semantics/article7057092021-07-21info:eu-repo/semantics/openAccess