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Gravitational waves and new hope for Quantum Gravity

by Prof. Ilya Shapiro (Universidade Federal de Juiz de Fora, MG, Brazil)

Mar 20, 2013 from 03:00 PM to 05:30 PM

Where Aula Teorici - Irnerio

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Abstract: We explore the dynamics of metric perturbations (gravitational waves) on the cosmological background in the theory with higher derivatives and semiclassical non-local corrections coming from massless conformal fields. It is shown, by means of analytical and numerical methods that there are no growing modes until the background has enegies of Planck order of magnitude. This result means, also, that there are good chances to construct renormalizable theory of quantum gravity which is unitary for the energies below Planck scale.