Speaker
Description
We present a unified (gravity and matter) weakly nonlocal theory unitary, causal, and finite at quantum level in the quantum field theory framework. As a consequence of finiteness, there is no Weyl anomaly and the theory turns out to be conformal invariant at classical as well at quantum level. Therefore, nonlocal quantum gravity is a conformal invariant theory in the spontaneously broken phase of the Weyl symmetry. Accordingly, following and extending the seminal paper by Narlikar and Kembhavi, we are able to provide explicit examples of singularity-free black hole exact solutions. The absence of singularities is based on the finiteness of the curvature invariants and, more important, on the geodesic completion. It tuns out that, no massive or massless particle can reach the singularity domains of the spacetime. Finally, we will present new results about unitarity in curved spacetime.