I present and discuss a class of solutions of the Wheeler-DeWitt equation describing wormholes generated by coupling of gravity to the electromagnetic field for Kantowski-Sachs and Bianchi type-I spacetimes. Since the electronic charge can be viewed as electric lines of force trapped in a finite region of spacetime, these solutions can be interpreted as the quantum corresponding to the Einstein-Rosen-Misner-Wheeler electromagnetic geon.
M. Cavaglia, "Quantum Electromagnetic Wormholes and Geometrical Description of the Electric Charge," Physical Review D, vol. 50, no. 8, pp. 5087-5092, American Physical Society (APS), Oct 1994.
The definitive version is available at https://doi.org/10.1103/PhysRevD.50.5087
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