Mathematics – Logic
Scientific paper
Apr 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983aipc...98..343s&link_type=abstract
PARTICLES AND FIELDS: Annual Meeting. AIP Conference Proceedings, Volume 98, pp. 343-357 (1983).
Mathematics
Logic
Scientific paper
During the past year, astounding progress has been made in the development of a radically new theory of the evolution of the early Universe. The new theory derives from the possibility that the Universe underwent a symmetry breaking phase transition in its early history that was strongly first order. During such a transition, the Universe can supercool into a metastable phase with a large vacuum energy density which results in a period of exponential expansion. It has recently been shown that in special types of first order transitions the Universe can escape from the metastable phase to a stable phase. Without a vacuum energy density contribution to the total energy density, the Universe returns to the expansion rate found in the hot big bang model. The existence of an epoch of exponential growth leads to a natural explanation of the cosmological homogeneity, isotropy, flatness, monopole and domain wall problems that plague the standard hot big bang model. The new cosmology has also been shown to lead to a (nearly) scale invariant spectrum of density perturbations in the early Universe, just the spectrum many cosmologists believe is necessary to explain the evolution of galaxies and clusters in our Universe.
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