Speaker
Luca Buoninfante
(Nordita)
Description
In the context of perturbative quantum field theory (QFT), the addition of quadratic-curvature invariants to the Einstein-Hilbert action makes it possible to achieve strict renormalizability in four dimensions. However, this theory exhibits unusual features due to an additional massive spin-2 ghost particle. In this talk, we are going to argue that despite the presence of the ghost and actually thanks to it, Quadratic Gravity can provide a consistent QFT description of the gravitational interaction at a fundamental level and explain new physics beyond Einstein's general relativity, e.g., it offers a natural explanation for the inflationary phase in the early Universe.
Primary author
Luca Buoninfante
(Nordita)
