Abstract
A technique is given to generate coupled scalar field solutions in colliding Einstein-Maxwell (EM) waves. By employing the Bell-Szekeres solution as seed and depending on the chosen scalar field, it is possible to construct nonsingular solutions. If the original EM solution is already singular, addition of scalar fields does not make the physics any better. In particular, scalar field solution that is transformable to spherical symmetry is plagued with singularities.
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Gurtug, O., Halilsoy, M. & Sakalli, I. New Singular and Nonsingular Colliding Wave Solutions in Einstein-Maxwell-Scalar Theory. General Relativity and Gravitation 35, 2159–2170 (2003). https://doi.org/10.1023/A:1027349606694
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DOI: https://doi.org/10.1023/A:1027349606694