Mathematics – Logic
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aps..aprw10003g&link_type=abstract
American Physical Society, April Meeting, 2004, May 1-4, 2004, Denver, Colorado April 2004, MEETING ID: APR04, abstract #W10.003
Mathematics
Logic
Scientific paper
Cosmological observations show that dark energy dominates the current energy density of the universe. The equation of state relating the pressure and energy density of this dark energy, p = w ρ, appears to have w ≃ -1, with most analyses preferring w<-1. Dark energy with w<-1 causes the universe to undergo superexponential expansion in which the scale factor, expansion rate, and energy density of the universe diverge in a finite time. I will present the recent hypothesis (Gawiser 2003, astro-ph/0312440) that w>-1 is restored due to a phase transition at high energy density and show that this produces conditions observationally indistinguishable from the Hot Big Bang. Hence the current dark energy can serve as initial conditions for an apparent Big Bang without a spacetime singularity. This process of rejuvenation may have occurred in our past, making our universe much older than it appears.
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