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Modified double copy for quasitopological gravity with matter
Phys. Rev. D 114, 104004 – Published 2 November, 2026
DOI: https://doi.org/10.1103/1jld-3h5j
Abstract
We extend the modified double-copy construction to quasitopological gravity (QTG) coupled to matter. Spherically symmetric QTG solutions in dimensions are generated from an auxiliary gauge field in a flat ()-dimensional spacetime. The gravitational field equations reduce to two relations determined by the QTG generating function and the matter stress-energy tensor. For a broad class of spherically symmetric matter sources, solutions of the auxiliary gauge-field equations can be used to construct exact solutions of the QTG field equations. The framework applies to Maxwell theory, nonlinear electrodynamics, and Yang-Mills theory, encompasses both static and Vaidya-type solutions, and reproduces the Einstein-gravity limit.
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