Quantum gravity with purely virtual particles:from quantum field theory to primordial cosmology

Talk by D. Anselmi at NICPB, Tallinn, Estonia on Oct 14th, 2020

Abstract: I introduce the concept of purely virtual particle, or fakeon, and show how to use to make sense of quantum gravity as a quantum field theory. Then I discuss novel features of the classical limit and derive predictions in inflationary cosmology that could be tested in the forthcoming years, paying special attention to the effects of fakeons on perturbation spectra

For the pdf file containing the slides of the talk, see http://renormalization.com/20s3/