Smooth ``creation'' of an open universe in five dimensions

Details Smooth ``creation'' of an open universe in five dimensions Smooth ``creation'' of an open universe in five dimensions

1998-04-15

arxiv.org/abs/hep-th/9804106v1

Physics

High Energy Physics

High Energy Physics - Theory

8 pages

Scientific paper

We present a non-singular instanton describing the creation of an open universe with a compactified extra dimension. The four dimensional section of this solution is a singular instanton of the type introduced by Hawking and Turok. The ``singularity'' is viewed in five dimensions as a smooth bubble of ``nothing'' which eats up a portion of spacetime as it expands. Flat space with a compact extra dimension is shown to be gravitationally metastable, but sufficiently long lived if the size of the extra dimension is large compared with the Planck length.

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