author={Roberto Casadio},
  journal={International Journal of Modern Physics A},
  • R. Casadio
  • Published 3 June 2008
  • Physics
  • International Journal of Modern Physics A
We propose to include gravity in quantum field theory nonperturbatively, by modifying the propagators so that each virtual particle in a Feynman graph move in the space–time determined by the four-momenta of the other particles in the same graph. By making additional working assumptions, we are able to put this idea at work in a simplified context, and obtain a modified Feynman propagator for the massless neutral scalar field. Our expression shows a suppression at high momentum, strong enough… 
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