HEP Colloquia 2023

by Dr Leonardo Modesto (Department of Physics of the Southern University of Science and >> Technology (SUSTech) in Shenzhen)

Tuesday 27 Jun 2023, 14:30 → 16:30 Europe/Rome

Aula C (Department of Physics)

Nonlocal Quantum Gravity in Particle Physics, Black Holes and Cosmology

In the quantum field theory framework, "Nonlocal Quantum Gravity"' (with or without matter) turns out to be a consistent candidate for all fundamental interactions compatible with linear and nonlinear classical stability, perturbative unitarity, causality, and quantum finiteness. In particular, the latter property implies that the theory is Weyl 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. In the first part of the presentation, the speaker will review the theory and its main properties, while the second part I will focus on some implications, namely: (i) singularity free black holes, (ii) resolution of the information loss problem, (iii) a new scenario for the early Universe in nonlocal conformal quantum gravity as an alternative to Inflation, and (iv) a geometric origin of the galactic rotation curves based on conformal invariance as an alternative to dark matter.