The Petrov and Kaigorodov-Ozsváth Solutions: Spacetime as a Group Manifold

Details The Petrov and Kaigorodov-Ozsváth Solutions: Spacetime as a Group Manifold The Petrov and Kaigorodov-Ozsváth Solutions: Spacetime as a Group Manifold

2008-02-27

arxiv.org/abs/0802.4082v2

Class.Quant.Grav.25:165009,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

25 pages (latex), 3 figures, corrected a few minor errors

Scientific paper

10.1088/0264-9381/25/16/165009

The Petrov solution (for $\Lambda=0$) and the Kaigorodov-Ozsv\'ath solution (for $\Lambda<0$) provide examples of vacuum solutions of the Einstein equations with simply-transitive isometry groups. We calculate the boundary stress-tensor for the Kaigorodov-Ozsv\'ath solution in the context of the adS/CFT correspondence. By giving a matrix representation of the Killing algebra of the Petrov solution, we determine left-invariant one-forms on the group. The algebra is shown to admit a two-parameter family of linear deformations a special case of which gives the algebra of the Kaigorodov-Ozsv\'ath solution. By applying the method of non-linear realisations to both algebras, we obtain a Lagrangian of Finsler type from the general first-order action in both cases. Interpreting the Petrov solution as the exterior solution of a rigidly rotating dust cylinder, we discuss the question of creation of CTCs by spinning up such a cylinder. We show geodesic completeness of the Petrov and Kaigorodov-Ozsv\'ath solutions and determine the behaviour of geodesics in these spacetimes. The holonomy groups were shown to be given by the Lorentz group in both cases.

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