Can we predict the fate of the Universe?

Details Can we predict the fate of the Universe? Can we predict the fate of the Universe?

2000-02-07

arxiv.org/abs/astro-ph/0002153v3

Phys.Lett. B501 (2001) 257-263

Astronomy and Astrophysics

Astrophysics

10 LaTeX pages, 4 eps figures, version to appear in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(01)00151-4

We re-analyze the question of the use of cosmological observations to infer the present state and future evolution of our patch of the universe. In particular, we discuss under which conditions one might be able to infer that our patch will enter an inflationary stage, as a prima facie interpretation of the Type Ia supernovae and CMB data would suggest. We then establish a `physical' criterion for the existence of inflation, to be contrasted with the more `mathematical' one recently proposed by Starkman et al. \cite{STV}.

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