The Big Bang and the Quantum

Details The Big Bang and the Quantum The Big Bang and the Quantum

2010-05-29

arxiv.org/abs/1005.5491v1

AIP Conf.Proc.1241:109-121,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

18 pages, 6 figures. Plenary talk at the Invisible Universe conference held in Paris in July 2009. To appear in the Proceeding

Scientific paper

10.1063/1.3462605

This short review is addressed to cosmologists. General relativity predicts that space-time comes to an end and physics comes to a halt at the big-bang. Recent developments in loop quantum cosmology have shown that these predictions cannot be trusted. Quantum geometry effects can resolve singularities, thereby opening new vistas. Examples are: The big bang is replaced by a quantum bounce; the `horizon problem' disappears; immediately after the big bounce, there is a super-inflationary phase with its own phenomenological ramifications; and, in presence of a standard inflaton potential, initial conditions are naturally set for a long, slow roll inflation independently of what happens in the pre-big bang branch.

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