Quantum Gravity Features

This line of research deals with basic questions in the formulation of Canonical Quantum Gravity, like the problem of time in the Wheeler-DeWitt equation and the morphology of the primordial quantum Universes.

Furthermore, issues on the formulation of General Relativity in the first order formulation, especially in the framework of Ashtekar-Barbero-Immirzi variables are analyzed in view of optimizing the interpretation of the gravitational field as a non-Abelian Gauge interaction.

Finally, a significant attention is devoted to the problem of calculating Quantum Gravity corrections to the ordinary Quantum Field Theory on curved space-time. This study is developed starting from the Wheeler-DeWitt equation for the gravitational and matter fields, first considering a Born-Oppenheimer separation between gravity and matter degrees of freedom, and second by addressing a WKB scenario for the former.

People:

• Flavio Bombacigno

• Nicola Bortolotti

• Simon Boudet

• Francesco Cianfrani

• Giulia Maniccia

• Leonardo Torcellini

Some relevant publications:

https://doi.org/10.1103/PhysRevD.94.064021 (post-print on arXiv)

https://doi.org/10.1103/PhysRevD.103.103511 (post-print on arXiv)

https://doi.org/10.1016/j.nuclphysb.2020.115281 (post-print on arXiv)