Speaker
Daniele Oriti
(Dept Fisica Teorica, Universidad Complutense de Madrid)
Description
We outline key steps, assumptions and approximations taken to extract an effective continuum dynamics for both cosmological backgrounds and perturbations around them (thus effective quantum field theory) from quantum gravity models in the tensorial group field theory (thus spin foam and LQG) formalism. We also discuss in more detail recent results, showing an emergent cosmological acceleration at both late- and early-times produced by quantum gravity interactions. If time allows, we emphasize how the approximate framework in which these results are obtained, a non-linear extension of (loop) quantum cosmology, can be obtained and motivated from a more general perspective than a specific quantum gravity formalism.
Primary author
Daniele Oriti
(Dept Fisica Teorica, Universidad Complutense de Madrid)
