EPP Theory Seminar: Daniel Green: Freedom at the Speed of Light
A central challenge in cosmology is characterizing the space of (consistent) inflationary models. In principle, there could be many fundamentally distinct mechanisms of inflation that lead to different observational predictions. To make progress on this question, we show that the space of inflationary models can be related to the space of consistent renormalization group flows, where much more is known. We derive a sum-rule for the speed of propagation of the scalar fluctuations and discuss the implications both for inflation and RG flows.