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Unpublished Paper
Bending of Light in Quantum Gravity
Physical Review Letters (2015)
  • N.E.J. Bjerrum-Bohr
  • John F. Donoghue, University of Massachusetts - Amherst
  • Barry R Holstein, University of Massachusetts Amherst
  • Ludovic Planté
  • Pierre Vanhove
We consider the scattering of lightlike matter in the presence of a heavy scalar object (such as the Sun or a Schwarzschild black hole). By treating general relativity as an effective field theory we directly compute the nonanalytic components of the one-loop gravitational amplitude for the scattering of massless scalars or photons from an external massive scalar field. These results allow a semiclassical computation of the bending angle for light rays grazing the Sun, including long-range ℏ contributions. We discuss implications of this computation, in particular the violation of some classical formulations of the equivalence principle.
Publication Date
February 12, 2015
Pre-published version downloaded from archive Published version located at
Citation Information
N.E.J. Bjerrum-Bohr, John F. Donoghue, Barry R Holstein, Ludovic Planté, et al.. "Bending of Light in Quantum Gravity" Physical Review Letters (2015)
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