Particle scattering in loop quantum gravity.

@article{Modesto2005ParticleSI,
  title={Particle scattering in loop quantum gravity.},
  author={Leonardo Modesto and Carlo Rovelli},
  journal={Physical review letters},
  year={2005},
  volume={95 19},
  pages={
          191301
        }
}
We devise a technique for defining and computing -point functions in the context of a background-independent gravitational quantum field theory. We construct a tentative implementation of this technique in a perturbatively finite model defined using spin foam techniques in the context of loop quantum gravity. 
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We linearize extended ADM gravity around the flat torus, and use the associated Fock vacuum to construct a state that could play the role of a 'free' vacuum in loop quantum gravity. The state we
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This is an introduction to the by now fifteen years old research field of canonical quantum general relativity, sometimes called "loop quantum gravity". The term "modern" in the title refers to the