Graviton propagator from background-independent quantum gravity

Phys Rev Lett. 2006 Oct 13;97(15):151301. doi: 10.1103/PhysRevLett.97.151301. Epub 2006 Oct 10.

Abstract

We study the graviton propagator in Euclidean loop quantum gravity. We use spin foam, boundary-amplitude, and group-field-theory techniques. We compute a component of the propagator to first order, under some approximations, obtaining the correct large-distance behavior. This indicates a way for deriving conventional spacetime quantities from a background-independent theory.