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Bending of light in quantum gravity.

Authors
  • Bjerrum-Bohr, N E J
  • Donoghue, John F
  • Holstein, Barry R
  • Planté, Ludovic
  • Vanhove, Pierre
Type
Published Article
Journal
Physical Review Letters
Publisher
American Physical Society
Publication Date
Feb 13, 2015
Volume
114
Issue
6
Pages
61301–61301
Identifiers
PMID: 25723201
Source
Medline
License
Unknown

Abstract

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.

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