Processing of Cosmological Perturbations in a Cyclic Cosmology

The evolution of the spectrum of cosmological fluctuations from one cycle to the next is studied. It is pointed out that each cycle leads to a reddening of the spectrum. This opens up new ways to generate a scale-invariant spectrum of curvature perturbations. The large increase in the amplitude of t...

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Detalles Bibliográficos
Autor principal: Brandenberger, Robert H.
Lenguaje:eng
Publicado: 2009
Materias:
Particle Physics - Theory
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.80.023535
http://cds.cern.ch/record/1176739
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author Brandenberger, Robert H.
author_facet Brandenberger, Robert H.
author_sort Brandenberger, Robert H.
collection CERN
description The evolution of the spectrum of cosmological fluctuations from one cycle to the next is studied. It is pointed out that each cycle leads to a reddening of the spectrum. This opens up new ways to generate a scale-invariant spectrum of curvature perturbations. The large increase in the amplitude of the fluctuations quickly leads to a breakdown of the linear theory. More generaly, we see that, after including linearized cosmological perturbations, a cyclic universe cannot be truly cyclic.
id cern-1176739
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2009
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spelling cern-11767392023-03-12T04:37:18Zdoi:10.1103/PhysRevD.80.023535http://cds.cern.ch/record/1176739engBrandenberger, Robert H.Processing of Cosmological Perturbations in a Cyclic CosmologyParticle Physics - TheoryThe evolution of the spectrum of cosmological fluctuations from one cycle to the next is studied. It is pointed out that each cycle leads to a reddening of the spectrum. This opens up new ways to generate a scale-invariant spectrum of curvature perturbations. The large increase in the amplitude of the fluctuations quickly leads to a breakdown of the linear theory. More generaly, we see that, after including linearized cosmological perturbations, a cyclic universe cannot be truly cyclic.The evolution of the spectrum of cosmological fluctuations from one cycle to the next is studied. It is pointed out that each cycle leads to a reddening of the spectrum. This opens up new ways to generate a scale-invariant spectrum of curvature perturbations. The large increase in the amplitude of the fluctuations quickly leads to a breakdown of the linear theory. More generaly, we see that, after including linearized cosmological perturbations, a cyclic universe cannot be truly cyclic.arXiv:0905.1514CERN-PH-TH-2009-083oai:cds.cern.ch:11767392009-05-12
spellingShingle Particle Physics - Theory
Brandenberger, Robert H.
Processing of Cosmological Perturbations in a Cyclic Cosmology
title Processing of Cosmological Perturbations in a Cyclic Cosmology
title_full Processing of Cosmological Perturbations in a Cyclic Cosmology
title_fullStr Processing of Cosmological Perturbations in a Cyclic Cosmology
title_full_unstemmed Processing of Cosmological Perturbations in a Cyclic Cosmology
title_short Processing of Cosmological Perturbations in a Cyclic Cosmology
title_sort processing of cosmological perturbations in a cyclic cosmology
topic Particle Physics - Theory
url https://dx.doi.org/10.1103/PhysRevD.80.023535
http://cds.cern.ch/record/1176739
work_keys_str_mv AT brandenbergerroberth processingofcosmologicalperturbationsinacycliccosmology

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