Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2007-12-11
Phys.Rev.D77:024042,2008
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
REVTeX4, 11 pages, submitted to PRD
Scientific paper
10.1103/PhysRevD.77.024042
We construct exact nonstatic nonhomogeneous spherically symmetric solutions in the theory of gravity with a scalar field possessing the exponential potential. The solution of particular interest corresponds to the scalar field with negative kinetic energy, i.e. a ghost, and represents two asymptotically homogeneous spatially flat universes connected by a throat. We interpret this solution as a wormhole in cosmological setting. Both the universes and the wormhole throat are simultaneously expanding with acceleration. The character of expansion qualitatively depends on the wormhole's mass $m$. For $m=0$ the expansion goes exponentially, so that the corresponding spacetime configuration represents two de Sitter universes joining by the throat. For $m>0$ the expansion has the power character, so that one has the inflating wormhole connecting two homogeneous spatially flat universes expanding according to the power law into the final singularity. The stability analysis of the non-static wormholes reveals their instability against linear spherically symmetric perturbations.
Sushkov Sergey V.
Zhang Yuan-Zhong
No associations
LandOfFree
Scalar wormholes in cosmological setting and their instability does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Scalar wormholes in cosmological setting and their instability, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scalar wormholes in cosmological setting and their instability will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-474423