Relaxing the TCC bound on inflationary cosmology?

We demonstrate that the strict upper bounds on the energy scale of inflation and on the tensor-to-scalar ratio can be somewhat relaxed if we assume that – after an initial period of slow rolling when scales probed today in CMB experiments exit the Hubble radius – the equation of state of the backgro...

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Detalles Bibliográficos
Autores principales: Kamali, Vahid, Brandenberger, Robert
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2020
Materias:
Letter
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7319298/
https://www.ncbi.nlm.nih.gov/pubmed/32624682
http://dx.doi.org/10.1140/epjc/s10052-020-7908-8
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author Kamali, Vahid
Brandenberger, Robert
author_facet Kamali, Vahid
Brandenberger, Robert
author_sort Kamali, Vahid
collection PubMed
description We demonstrate that the strict upper bounds on the energy scale of inflation and on the tensor-to-scalar ratio can be somewhat relaxed if we assume that – after an initial period of slow rolling when scales probed today in CMB experiments exit the Hubble radius – the equation of state of the background changes to correspond to an almost marginally accelerating universe. Constructing an actual model in which this happens appears, however, to be unnatural.
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spelling pubmed-73192982020-07-01 Relaxing the TCC bound on inflationary cosmology? Kamali, Vahid Brandenberger, Robert Eur Phys J C Part Fields Letter We demonstrate that the strict upper bounds on the energy scale of inflation and on the tensor-to-scalar ratio can be somewhat relaxed if we assume that – after an initial period of slow rolling when scales probed today in CMB experiments exit the Hubble radius – the equation of state of the background changes to correspond to an almost marginally accelerating universe. Constructing an actual model in which this happens appears, however, to be unnatural. Springer Berlin Heidelberg 2020-04-25 2020 /pmc/articles/PMC7319298/ /pubmed/32624682 http://dx.doi.org/10.1140/epjc/s10052-020-7908-8 Text en © The Author(s) 2020 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. Funded by SCOAP3
spellingShingle Letter
Kamali, Vahid
Brandenberger, Robert
Relaxing the TCC bound on inflationary cosmology?
title Relaxing the TCC bound on inflationary cosmology?
title_full Relaxing the TCC bound on inflationary cosmology?
title_fullStr Relaxing the TCC bound on inflationary cosmology?
title_full_unstemmed Relaxing the TCC bound on inflationary cosmology?
title_short Relaxing the TCC bound on inflationary cosmology?
title_sort relaxing the tcc bound on inflationary cosmology?
topic Letter
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7319298/
https://www.ncbi.nlm.nih.gov/pubmed/32624682
http://dx.doi.org/10.1140/epjc/s10052-020-7908-8
work_keys_str_mv AT kamalivahid relaxingthetccboundoninflationarycosmology
AT brandenbergerrobert relaxingthetccboundoninflationarycosmology

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