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A new kind of cyclic universe
- 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
- Subjects :
- High Energy Physics - Theory
Nuclear and High Energy Physics
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
media_common.quotation_subject
Magnetic monopole
FOS: Physical sciences
General Relativity and Quantum Cosmology (gr-qc)
Astrophysics::Cosmology and Extragalactic Astrophysics
01 natural sciences
General Relativity and Quantum Cosmology
Cosmology
Theoretical physics
symbols.namesake
0103 physical sciences
Homogeneity (physics)
010306 general physics
Flatness (cosmology)
media_common
Physics
010308 nuclear & particles physics
Scale invariance
lcsh:QC1-999
Universe
Ekpyrotic universe
High Energy Physics - Theory (hep-th)
symbols
lcsh:Physics
Astrophysics - Cosmology and Nongalactic Astrophysics
Hubble's law
Subjects
Details
- ISSN :
- 03702693
- Volume :
- 795
- Database :
- OpenAIRE
- Journal :
- Physics Letters B
- Accession number :
- edsair.doi.dedup.....244390d95f289437c64de38bb73366e5