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Cosmological Evolution of a Ghost Scalar Field |
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| Authors: | Sergey V. Sushkov Sung-Won Kim |
| Affiliation: | (1) Department of Mathematics, Kazan State Pedagogical University, Mezhlauk 1 st., Kazan, 420021, Russia;(2) Department of Science Education, Ewha Womans University, Seoul, 120-750, Korea |
| Abstract: | 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 a 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. |
| Keywords: | Gravity de Sitter space-time scalar field |
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