Nov 05, 2001
A Cyclic Model of the Universe
Dr. Neil Turok, Cambridge
I discuss a new model for the Universe, which is a development of the
ekpyrotic scenario. The usual puzzles addressed by inflation -- the
horizon, flatness, and fluctuation puzzles -- are resolved but in a
completely different way. The new model goes further than inflation in
several respects. It connects M-theory and string theory to the early
universe, showing how the initial singularity may not be the impenetrable
barrier it has been hitherto thought to be, thereby resolving the puzzle
of the origin of time. It addresses the relative abundances of the
different types of matter in the universe today and provides a clear and
remarkable raison d'etre for dark energy present in today's universe.
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