Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1999-02-19
Mod.Phys.Lett. A15 (2000) 531-539
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
RevTeX, 12 pages, discussion on the fulfillment of the energy conditions added. Accepted for publication in Mod. Phys. Lett. A
Scientific paper
Einstein's equations for a 4+n-dimensional inhomogeneous space-time are presented, and a special family of solutions is exhibited for an arbitrary n. The solutions depend on two arbitrary functions of time. The time development of a particular member of this family is studied. This solution exhibits a singularity at t=0 and dynamical compactification of the n dimensions. It is shown that the behaviour of the system in the 4-dimensional i.e. post-compactification phase is constrained by the way in which the compactified dimensions are stabilized. The fluid that generates the solution is analyzed by means of the energy conditions.
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