Cosmological evolution of a ghost scalar field

Details Cosmological evolution of a ghost scalar field Cosmological evolution of a ghost scalar field

2004-04-08

arxiv.org/abs/gr-qc/0404037v1

Gen.Rel.Grav.36:1671-1678,2004

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

8 pages

Scientific paper

10.1023/B:GERG.0000032159.46106.

We consider a scalar field with a negative kinetic term minimally coupled to gravity. We obtain an exact non-static spherically symmetric solution which describes a wormhole in cosmological setting. The wormhole is shown to connect two homogeneous spatially flat universes expanding with acceleration. Depending on the wormhole's mass parameter $m$ the acceleration can be constant (the de Sitter case) or infinitely growing.

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