Publication : t14/108

Bending of Light in Quantum Gravity

Vanhove P. (CEA, IPhT (Institut de Physique Théorique), F-91191 Gif-sur-Yvette, France)
Planté L. (CEA, IPhT (Institut de Physique Théorique), F-91191 Gif-sur-Yvette, France)
Bjerrum-Bohr N.E.J. (The Niels Bohr Institute Blegdamsvej 17, DK-2100 Copenhagen, DENMARK)
Donoghue, John (University of Massachusetts, Amherst)
Holstein B. (University of Massachusetts, Amherst)
Abstract:
We consider the scattering of light-like matter in the presence of a heavy scalar object (such as the sun or a black hole). By treating general relativity as an effective field theory we directly compute the non-analytic parts of the one-loop gravitational amplitude for the scattering of massless scalars or photons from an external massive scalar field. These results allow a semi-classical computation of the bending angle for light-rays grazing the sun, including long-range $hbar$ contributions. We discuss implications of this computation, in particular the violation of some classical formulations of the equivalence principle.
Année de publication : 2015
Revue : Phys. Rev. Lett. 114 061301 (2015)
DOI : 10.1103/PhysRevLett.114.061301
Preprint : arXiv:1410.7590
Langue : Anglais

 

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