HET Seminar at IAS | Vladimir Kazakov, École Normale Supeieure | “Conformal Fishnet Theory”

Fri, May 18, 2018, 1:45 pm
Bloomberg Lecture Hall

I discuss a new family of four-dimensional CFTs, recently proposed by O.Gurdogan and myself, emerging as a double scaling limit of weakly coupled and strongly gamma-twisted N=4 SYM theory. These non-supersymmetric and  non-unitary CFTs inherit the planar integrability of N=4 SYM and  present a unique opportunity of non-perturbative study of  four-dimensional conformal physics. Important physical quantities are dominated by a limited set of "chiral"  Feynman graphs, such as  "fishnet"  graphs for the simplest, bi-scalar model. I present  the results of exact calculation of some of these quantities, such as anomalous dimensions of local operators, some 3- and 4-point correlation functions and scattering amplitudes, by means of quantum spin chain techniques or the quantum spectral curve (QSC) approach originally proposed for N=4 SYM. The bi-scalar theory appears to be a remarkable "generator" of large families of integrable, i.e. computable multi-loop Feynman graphs.