Charged Ellis wormhole and black bounce

Abstract

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.

Bounce corrections to gravitational lensing, quasinormal spectral stability and gray-body factors of Reissner-Nordström black holes

“…The research originates from a bounce parameter associated with the Plank scale introduced [16] by Visser et al in the modification of the Schwarzschild black hole. A great variety of solutions based on bounce and quantum corrections have been obtained [17][18][19][20][21], which provides us with the treatment for the singularities of black holes. All of these black hole mimickers are globally free from curvature singularities.…”

Gravitational lensing in the Simpson-Visser black-bounce spacetime in a strong deflection limit

“…Bronnikov et al have focused on the nature of wormholes in the spacetime [73]. The generalization or alternatives of the Simpson-Visser spacetime [74][75][76][77] and rotating cases [78] are also suggested.…”

Rotating spacetime: black-bounces and quantum deformed black hole

“…Since this work, people have done a lot of research on this black-bounce spacetime. For example, the properties of black hole/wormhole spacetime are studied by using gravitational wave echo signal [5], Huang and Yang studied the transformation of electrically charged Alice wormholes into BHs [6], Bronnikov and Konoplya studied the influence of the black-bounce solution on the gravitational echo signal under the model world model [7], Lobo et al studied the dynamic properties of the black hole/wormhole transformation solution [8], Nascimento et al proposes to verify the properties of this transformation solution by gravitational lensing, and studies the absorption process of massless scalar waves under this transformation solution [9,10]. Lobo et al extends the black-bounce solution to a more general case [11].…”