Smooth “creation” of an open universe in five dimensions
نویسنده
چکیده
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. Typeset using REVTEX
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