Journal
PHYSICAL REVIEW D
Volume 103, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.103.084052
Keywords
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Funding
- Fundacao para a Ciencia e a Tecnologia (FCT) Scientific Employment Stimulus [CEECINST/00032/2018]
- FCT [UID/FIS/04434/2020, PTDC/FIS-OUT/29048/2017, CERN/FIS-PAR/0037/2019]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico-CNPq, Brazil
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior-Brasil (CAPES) [001]
- Victoria University of Wellington
- Marsden fund
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This article introduces novel black-bounce spacetimes, analyzing their regularity, energy conditions, and causal structure, and presents several new geometries and theorems.
We develop a number of novel black-bounce spacetimes. These are specific regular black holes where the area radius always remains nonzero, thereby leading to a throat that is either timelike (corresponding to a traversable wormhole), spacelike (corresponding to a bounce into a future universe), or null (corresponding to a one-way wormhole). We first perform a general analysis of the regularity conditions for such a spacetime and then consider a number of specific examples. The examples are constructed using a mass function similar to that of Fan-Wang and fall into several particular cases, such as the original Simpson-Visser model, a Bardeen-type model, and other generalizations thereof. We analyze the regularity, energy conditions, and causal structure of these models. The main results are several new geometries, more complex than before, with two or more horizons, with the possibility of an extremal case. We derive a general theorem regarding static spacetime regularity and another general theorem regarding (non) satisfaction of the classical energy conditions.
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