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Four-dimensional traversable wormholes and bouncing cosmologies in vacuum

  • Andrés AnabalónEmail author
  • Julio Oliva
Open Access
Regular Article - Theoretical Physics
  • 33 Downloads

Abstract

In this letter we point out the existence of solutions to General Relativity with a negative cosmological constant in four dimensions, which contain solitons as well as traversable wormholes. The latter connect two asymptotically locally AdS4 spacetimes. At every constant value of the radial coordinate the spacetime is a spacelike warped AdS3. We compute the dual energy momentum tensor at each boundary showing that it yields different results. We also show that these vacuum wormholes can have more than one throat and that they are indeed traversable by computing the time it takes for a light signal to go from one boundary to the other, as seen by a geodesic observer. We generalize the wormholes to include rotation and charge. When the cosmological constant is positive we find a cosmology that is everywhere regular, has either one or two bounces and that for late and early times matches the Friedmann-Lemaître-Robertson-Walker metric with spherical topology and an exponential scale factor.

Keywords

AdS-CFT Correspondence Classical Theories of Gravity 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Copyright information

© The Author(s) 2019

Authors and Affiliations

  1. 1.Departamento de Ciencias, Facultad de Artes LiberalesUniversidad Adolfo IbáñezViña del MarChile
  2. 2.Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut)PotsdamGermany
  3. 3.Departamento de FísicaUniversidad de ConcepciónConcepciónChile

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