From Big Bang to Big Crunch and Beyond

Details From Big Bang to Big Crunch and Beyond From Big Bang to Big Crunch and Beyond

2002-04-23

arxiv.org/abs/hep-th/0204189v2

JHEP 0206 (2002) 017

Physics

High Energy Physics

High Energy Physics - Theory

36 pages, 4 figures; references added

Scientific paper

10.1088/1126-6708/2002/06/017

We study a quotient Conformal Field Theory, which describes a 3+1 dimensional cosmological spacetime. Part of this spacetime is the Nappi-Witten (NW) universe, which starts at a ``big bang'' singularity, expands and then contracts to a ``big crunch'' singularity at a finite time. The gauged WZW model contains a number of copies of the NW spacetime, with each copy connected to the preceeding one and to the next one at the respective big bang/big crunch singularities. The sequence of NW spacetimes is further connected at the singularities to a series of non-compact static regions with closed timelike curves. These regions contain boundaries, on which the observables of the theory live. This suggests a holographic interpretation of the physics.

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