Motion of photons in scalar-tensor theory of gravitation with spin-torsion coupling

Details Motion of photons in scalar-tensor theory of gravitation with spin-torsion coupling Motion of photons in scalar-tensor theory of gravitation with spin-torsion coupling

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988cqgra...5.1501s&link_type=abstract

Classical and Quantum Gravity (ISSN 0264-9381), vol. 5, Nov. 1, 1988, p. 1501-1511.

Physics

5

Field Theory (Physics), Gravitation Theory, Gravitational Fields, Quantum Theory, Solar Gravitation, Electromagnetic Fields, Photons, Spin, Torsion

Scientific paper

From a geometric interpretation of the Brans-Dicke theory it is argued that the Brans-Dicke scalar field may also play the role of a torsion potential. Minimal coupling of electromagnetism to gravitation then leads to a modified gauge invariance and modified equations of motion of the photon. In the present paper the effect of this photon-torsion coupling is studied. In particular the question whether this photon-torsion-scalar coupling could relax the restrictive experimental bounds on the Brans-Dicke coupling is investigated. It is found that the photon-torsion interaction has a negligible effect on the motion of photons in the gravitational field of the sun.

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