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Ellis wormhole without a phantom scalar field
Pedro Cañate1, Joseph Sultana2, Demosthenes Kazanas3
1Departamento de Física, Centro de Investigación y de Estudios Avanzados del I.P.N., Apdo. 14-740, 07000 Mexico City, Mexico.
Abstract:
In this paper, we present an exact solution for (3 + 1)-dimensional Einstein-scalar-Gauss-Bonnet theory (EsGB) in electrovacuum. The solution is characterized by only one parameter, Q, which in general can be associated with the electromagnetic field and the scalar field. We show that the solution corresponds to a charged wormhole with a throat at the region r = |Q| and is also supported by a real scalar field having a positive kinetic term. We show that the solution belongs to the most general class of solutions known as Ellis wormholes but without the need for "exotic matter" or a phantom scalar field.
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