Inflation from Extra Dimensions

Details Inflation from Extra Dimensions Inflation from Extra Dimensions

1994-11-15

arxiv.org/abs/gr-qc/9411041v1

Phys.Lett. B343 (1995) 69-75

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

15 pages, LaTeX file, 4 Figures

Scientific paper

10.1016/0370-2693(94)01499-3

A gravity-driven inflation is shown to arise from a simple higher dimensional universe. In vacuum, the shear of $n>1$ contracting dimensions is able to inflate the remaining three spatial dimensions. Said another way, the expansion of the 3-volume is accelerated by the contraction of the $n$-volume. Upon dimensional reduction, the theory is equivalent to a four dimensional cosmology with a dynamical Planck mass. A connection can therefore be made to recent examples of inflation powered by a dilaton kinetic energy. Unfortunately, the graceful exit problem encountered in dilaton cosmologies will haunt this cosmology as well.

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