On Quadratic Gravity

Abstract

We provide a brief overview of what is known about Quadratic Gravity, which includes terms quadratic in the curvatures in the fundamental action. This is proposed as a renormalizeable UV completion for quantum gravity which continues to use the metric as the fundamental dynamical variable. However, there are unusual field-theoretic consequences because the propagators contain quartic momentum dependence. At the present stage of our understanding, Quadratic Gravity continues to be a viable candidate for a theory of quantum gravity.

Comments: 9 pages. This is a distant reflection of a talk given by JFD at the online workshop on Quantum Gravity, Higher Derivatives and Nonlocality, and is to be published in a special volume for the workshop