Speaker
Denis Karateev
Description
I will discuss whether the rubber-sheet picture of gravity can be made into a consistent quantum field theoretic model. The setup is a vibrating four-dimensional brane embedded in a higher-dimensional flat space-time, with matter confined to the brane. The induced metric is built from the brane fluctuations (phonons), which mediate forces between matter sources. I will explain why the generic force is not Newtonian, how an apparent Einstein-gravity regime could arise at intermediate distances, and how S-matrix bootstrap constraints on phonon scattering strongly constrain this possibility.