2006•Physical Review LettersOpen access

Graviton Propagator from Background-Independent Quantum Gravity

Carlo Rovelli

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.

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Key concepts: Graviton, Propagator, Physics, Quantum gravity, Spin foam, Loop quantum gravity, Group field theory, Spacetime