John Donoghue (UMass Amherst), Quadratic Gravity and its relatives

Tuesday 29 Nov 2022, 14:15 → 15:30 Europe/Stockholm

Albano 3: 6228 - Mega (22 seats) (Albano Building 3)

Quadratic Gravity is a renormalizable UV completion for quantum gravity, which maintains the metric as its dynamical variable. However, because of the higher derivatives involved, it conflicts with the standard assumptions of QFT. I will overview the issues of this theory, and will particularly focus on the most problematic aspect. Some simpler models also can be used to illustrate the physics involved.