From Big Crunch to Big Bang

Details From Big Crunch to Big Bang From Big Crunch to Big Bang

2001-08-24

arxiv.org/abs/hep-th/0108187v4

Phys.Rev.D65:086007,2002

Physics

High Energy Physics

High Energy Physics - Theory

16 pages, compressed and RevTex file, including three postscript figure files. Minor changes, version to appear in Physical Re

Scientific paper

10.1103/PhysRevD.65.086007

We consider conditions under which a universe contracting towards a big crunch can make a transition to an expanding big bang universe. A promising example is 11-dimensional M-theory in which the eleventh dimension collapses, bounces, and re-expands. At the bounce, the model can reduce to a weakly coupled heterotic string theory and, we conjecture, it may be possible to follow the transition from contraction to expansion. The possibility opens the door to new classes of cosmological models. For example, we discuss how it suggests a major simplification and modification of the recently proposed ekpyrotic scenario.

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