DATA: 22-11-2017

Seminario di Matteo Bertolini (SISSA) Abstract: Conformal manifolds are families of conformal field Theories connected by exactly marginal deformations. They are ubiquitous in theories with supersymmetry,while there are no examples, at least in d>2, in non-supersymmetric setups. One can question whether they can ever exists. In this talk I address these issues by looking at the constraints that a conformal field theory should enjoy to admit exactly marginal deformations. In particular, using tools from conformal perturbation theory, I derive a sum rule the CFT should satisfy, and discuss some of the implications that this has on the CFT spectrum and OPE coefficients. Then, I will focus on conformal field theories admitting a gravity dual description, and as such a large-N expansion. I will discuss the relation between conformal perturbation theory and loop expansion in the bulk, and show how such connection could help in the search for non-supersymmetric) conformal manifolds beyond the planar limit. Using a toy-example I will show that this is not an empty set.


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