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2012

Did the universe have a beginning?

Mithani, Audrey, Vilenkin, Alexander

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We discuss three candidate scenarios which seem to allow the possibility that the universe could have existed forever with no initial singularity: eternal infation, cyclic evolution, and the emergent universe.

The first two of these scenarios are geodesically incomplete to the past, and thus cannot describe a universe without a beginning.
The third, although it is stable with respect to classical perturbations, can collapse quantum mechanically, and therefore cannot have an eternal past.

Did the universe have a beginning? · Around

Built on

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B.S. DeWitt, Quantum Theory of Gravity. 1. The Canonical Theory
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S. W. Hawking and G. F. R. Ellis, The Large Scale Structure of Spacetime (Cambridge University Press, Cambridge, England, 1973)
1973
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A. Borde and A. Vilenkin, Eternal inflation and the initial singularity
1994
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M. P. Dabrowski and A. L. Larsen, Quantum tunneling effect in oscillating Friedmann cosmology
1995
Earlier work this paper cites.

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P.W. Graham, B. Horn, S. Kachru, S. Rajendran, and G. Torroba, A Simple Harmonic Universe
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Cited in the paper.

Then

D.J. Mulryne, R. Tavakol, J.E. Lidsey and G.F.R. Ellis, An emergent universe from a loop
2005
Later among the works it cites.
P. Wu and H. Yu, Emergent universe from the Hořava-Lifshitz gravity
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2010
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S. del Campo, E. Guendelman, A.B. Kaganovich, R. Herrera and P. Labrana, Emergent universe from scale invariant two measures theory
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2011
Later among the works it cites.
A.T. Mithani and A. Vilenkin, Collapse of simple harmonic universe
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Closest in time.

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