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A new kind of cyclic universe

Authors :
Anna Ijjas
Paul J. Steinhardt
Source :
Physics Letters, Physics Letters B, Vol 795, Iss, Pp 666-672 (2019)
Publication Year :
2019
Publisher :
Elsevier BV, 2019.

Abstract

Combining intervals of ekpyrotic (ultra-slow) contraction with a (non-singular) classical bounce naturally leads to a novel cyclic theory of the universe in which the Hubble parameter, energy density and temperature oscillate periodically, but the scale factor grows by an exponential factor from one cycle to the next. The resulting cosmology not only resolves the homogeneity, isotropy, flatness and monopole problems and generates a nearly scale invariant spectrum of density perturbations, but it also addresses a number of age-old cosmological issues that big bang inflationary cosmology does not. There may also be wider-ranging implications for fundamental physics, black holes and quantum measurement.<br />7 pages, 3 figures

Details

ISSN :
03702693
Volume :
795
Database :
OpenAIRE
Journal :
Physics Letters B
Accession number :
edsair.doi.dedup.....244390d95f289437c64de38bb73366e5