A nonminimally coupled, conformally extended Einstein-Maxwell theory of pp-waves

Authors: DÜNDAR TEKİN DERELİ, YORGO ŞENİKOĞLU

Abstract: A nonminimal coupling of Weyl curvatures to electromagnetic fields is considered in Brans-Dicke-Maxwell theory. The gravitational field equations are formulated in a Riemannian spacetime where the spacetime torsion is constrained to zero by the method of Lagrange multipliers in the language of exterior differential forms. The significance and ramifications of nonminimal couplings to gravity are examined in a pp-wave spacetime.

Keywords: Classical general relativity, gravitational waves, modified theories of gravity

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