Quasi-topological electromagnetism defined via (F∧F)^2 yields p = -ρ fluid behavior, alters dyonic black holes with up to four horizons and three photon spheres, and acts as dark energy that can couple to scalars while preserving FLRW solutions.
Nontopological Magnetic Monopoles and New Magnetically Charged Black Holes
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abstract
The existence of nonsingular classical magnetic monopole solutions is usually understood in terms of topologically nontrivial Higgs field configurations. We show that finite energy magnetic monopole solutions also exist within a class of purely Abelian gauge theories containing charged vector mesons, even though the possibility of nontrivial topology does not even arise. provided that certain relationships among the parameters of the theory are satisfied. These solutions are singular if these relationships do not hold, but even then become meaningful once the theory is coupled to gravity, for they then give rise to an interesting new class of magnetically charged black holes with hair.
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hep-th 1years
2019 1verdicts
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Quasi-topological Electromagnetism: Dark Energy, Dyonic Black Holes, Stable Photon Spheres and Hidden Electromagnetic Duality
Quasi-topological electromagnetism defined via (F∧F)^2 yields p = -ρ fluid behavior, alters dyonic black holes with up to four horizons and three photon spheres, and acts as dark energy that can couple to scalars while preserving FLRW solutions.