Spherically Symmetric and Rotating Wormholes Produced by Lightlike Branes
Apr, 2009
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Abstract: (arXiv)
Lightlike p-branes (LL-branes) with dynamical (variable) tension allow simple and elegant Polyakov-type and dual to it Nambu-Goto-like world-volume action formulations. Here we first briefly describe the dynamics of LL-branes as test objects in various physically interesting gravitational backgrounds of black hole type, including rotating ones. Next we show that LL-branes are the appropriate gravitational sources that provide proper matter energy momentum tensors in the Einstein equations of motion needed to generate traversable wormhole solutions, in particular, self-consistent cylindrical rotating wormholes, with the LL-branes occupying their throats. Here a major role is being played by the dynamical LL-brane tension which turns out to be negative but may be of arbitrary small magnitude. As a particular solution we obtain traversable wormhole with Schwarzschild geometry generated by a LL-brane positioned at the wormhole throat, which represents the correct consistent realization of the original Einstein-Rosen 'bridge' manifold.- 04.70.-s
- 04.50.+h
- 11.25.-w
- Traversable wormholes
- non-Nambu-Goto lightlike branes
- dynamical brane tension
- black hole's horizon straddling
- wormhole: rotation
- tensor: energy-momentum
- gravitation: background
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