Phantom wormholes in Einstein–Maxwell-dilaton theory

Goulart, Prieslei

doi:10.1088/1361-6382/aa9dfc

Cited by 59 publications

(34 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some of the generalization was given in Ref. [18], where the scalar field is modified by the new integration constant from the Maxwell equation. In this appendix, we would like to find the coupling function Z(φ) such that the theory admits exact charged wormhole solutions but with the scalar remaining identically the same as the (neutral) Ellis wormhole.…”

Section: A Constructing the Theory And Solutionsmentioning

confidence: 99%

Charged Ellis wormhole and black bounce

Huang

Yang

2019

Phys. Rev. D

View full text Add to dashboard Cite

By replacing the scalar φ with iφ in the solution constructed in Ref [1], we obtain electrically-charged wormhole and black hole solutions in the Einstein-Maxwell-scalar theory, in which the scalar is a phantom field coupled to the Maxwell field non-minimally.Our solutions are simpler than the previously-known charged wormholes in the Einstein-Maxwell-dilaton theory in that both the scalar and the radius of the foliating sphere of our solutions are independent of electric charge. The wormhole solution has two asymptotically flat regions and reduces to Ellis wormhole when the charge is zero. We draw the embedding diagrams for the wormholes and demonstrate that the two sides are asymmetric. As the charge increases, horizons will appear, and the wormhole becomes a black hole, with no curvature singularity but a wormhole throat or a bounce. We analyze black hole thermodynamics and the causal structure. We also determine the photon spheres of both the wormhole and the black hole and discuss their observable characteristics.

show abstract

Section: A Constructing the Theory And Solutionsmentioning

confidence: 99%

Charged Ellis wormhole and black bounce

Huang

Yang

2019

Phys. Rev. D

View full text Add to dashboard Cite

show abstract

“…More recently, using the GBT, Jusufi and Ovgun calculated the deflection angle for the quantum improved Kerr black hole pierced by a cosmic string to show the quantum effects on it [25,28]. The deflection angle can be calculated for the charged wormholes in Einstein-Maxwell-dilaton theory using the GBT and rotating global monopole spacetime [27,29,30]. Moreover, Sakalli and Ovgun showed the deflection angle of Rindler modified Schwarzschild back hole at the infra-red region [31].…”

Section: Introductionmentioning

confidence: 99%

Gravitational lensing by rotating wormholes

2018

View full text Add to dashboard Cite

In this paper the deflection angle of light by a rotating Teo wormhole spacetime is calculated in the weak limit approximation. We mainly focus on the weak deflection angle by revealing the gravitational lensing as a partially global topological effect. We apply the Gauss-Bonnet theorem (GBT) to the optical geometry osculating the Teo-Randers wormhole optical geometry to calculate the deflection angle. Furthermore we find the same result using the standard geodesic method. We have found that the deflection angle can be written as a sum of two terms, namely the first term is proportional to the throat of the wormhole and depends entirely on the geometry, while the second term is proportional to the spin angular momentum parameter of the wormhole. A direct observation using lensing can shed light and potentially test the nature of rotating wormholes by comparing with the black holes systems.

show abstract

“…In the article cited above, Goulart [1] proposed a phantom wormhole solution by including the Einstein-Maxwell-dilaton field in the action. The extended solution is claimed to yield the anti-Fisher solution, when the electric charge Q is switched off.…”

mentioning

confidence: 99%