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SUMMARY:Quantum gravity from d=2 to d=4
DTSTART:20231110T130000Z
DTEND:20231110T140000Z
DTSTAMP:20240228T052400Z
UID:indico-event-10565@indico.math.cnrs.fr
DESCRIPTION:Speakers: Riccardo Martini (INFN - Sezione di Pisa)\n\nWhile G
eneral Relativity is not renormalizable with perturbation theory close to
d=4\, close to d=2 there exist an UV fixed point within the perturbative r
egime. The idea that such a fixed point still persist in d=4 in the non-pe
rturbative regime was originally formulated by Weinberg in the 70s. Today\
, functional methods collected many evidences for the existence of such UV
completion\, however they do not allow for a clear investigation of the s
pectrum of the theory and a right definition of the observables. Reviving
the original formulation of the conjecture\, we employ perturbation theory
in a scheme that allows for an explicit analytic continuation of the quan
tum theory to any value of d and inspect the limits d->2 and d->4. Specifi
cally\, we focus on the UV critical surface and how higher derivative oper
ators contribute to it. \n\nhttps://indico.math.cnrs.fr/event/10565/
LOCATION:Fokko du Cloux (Bâtiment Braconnier)
URL:https://indico.math.cnrs.fr/event/10565/
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