Bouncing Cosmologies with Dark Matter and Dark Energy

Bouncing Cosmologies with Dark Matter and Dark Energy

We review matter bounce scenarios where the matter content is dark matter and dark energy. These cosmologies predict a nearly scale-invariant power spectrum with a slightly red tilt for scalar perturbations and a small tensor-to-scalar ratio. Importantly, these models predict a positive running of t...

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Main Authors: Yi-Fu Cai, Antonino Marcianò, Dong-Gang Wang, Edward Wilson-Ewing
Format: Article
Language:English
Published: MDPI AG 2016-12-01
Series:Universe
Subjects:
Matter bounce scenario
interacting dark energy
alternatives to inflation
Online Access:http://www.mdpi.com/2218-1997/3/1/1
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spelling doaj-08b2d174ddfe4919ae29b54af98607b42020-11-25T01:11:43ZengMDPI AGUniverse2218-19972016-12-0131110.3390/universe3010001universe3010001Bouncing Cosmologies with Dark Matter and Dark EnergyYi-Fu Cai0Antonino Marcianò1Dong-Gang Wang2Edward Wilson-Ewing3CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Chinese Academy of Sciences, 230026 Hefei, ChinaDepartment of Physics & Center for Field Theory and Particle Physics, Fudan University, 200433 Shanghai, ChinaCAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Chinese Academy of Sciences, 230026 Hefei, ChinaMax Planck Institute for Gravitational Physics (Albert Einstein Institute), Am Mühlenberg 1, 14476 Golm, GermanyWe review matter bounce scenarios where the matter content is dark matter and dark energy. These cosmologies predict a nearly scale-invariant power spectrum with a slightly red tilt for scalar perturbations and a small tensor-to-scalar ratio. Importantly, these models predict a positive running of the scalar index, contrary to the predictions of the simplest inflationary and ekpyrotic models, and hence, could potentially be falsified by future observations. We also review how bouncing cosmological space-times can arise in theories where either the Einstein equations are modified or where matter fields that violate the null energy condition are included.http://www.mdpi.com/2218-1997/3/1/1Matter bounce scenariointeracting dark energyalternatives to inflation
collection DOAJ
language English
format Article
sources DOAJ
author Yi-Fu Cai
Antonino Marcianò
Dong-Gang Wang
Edward Wilson-Ewing
spellingShingle Yi-Fu Cai
Antonino Marcianò
Dong-Gang Wang
Edward Wilson-Ewing
Bouncing Cosmologies with Dark Matter and Dark Energy
Universe
Matter bounce scenario
interacting dark energy
alternatives to inflation
author_facet Yi-Fu Cai
Antonino Marcianò
Dong-Gang Wang
Edward Wilson-Ewing
author_sort Yi-Fu Cai
title Bouncing Cosmologies with Dark Matter and Dark Energy
title_short Bouncing Cosmologies with Dark Matter and Dark Energy
title_full Bouncing Cosmologies with Dark Matter and Dark Energy
title_fullStr Bouncing Cosmologies with Dark Matter and Dark Energy
title_full_unstemmed Bouncing Cosmologies with Dark Matter and Dark Energy
title_sort bouncing cosmologies with dark matter and dark energy
publisher MDPI AG
series Universe
issn 2218-1997
publishDate 2016-12-01
description We review matter bounce scenarios where the matter content is dark matter and dark energy. These cosmologies predict a nearly scale-invariant power spectrum with a slightly red tilt for scalar perturbations and a small tensor-to-scalar ratio. Importantly, these models predict a positive running of the scalar index, contrary to the predictions of the simplest inflationary and ekpyrotic models, and hence, could potentially be falsified by future observations. We also review how bouncing cosmological space-times can arise in theories where either the Einstein equations are modified or where matter fields that violate the null energy condition are included.
topic Matter bounce scenario
interacting dark energy
alternatives to inflation
url http://www.mdpi.com/2218-1997/3/1/1
work_keys_str_mv AT yifucai bouncingcosmologieswithdarkmatteranddarkenergy
AT antoninomarciano bouncingcosmologieswithdarkmatteranddarkenergy
AT donggangwang bouncingcosmologieswithdarkmatteranddarkenergy
AT edwardwilsonewing bouncingcosmologieswithdarkmatteranddarkenergy
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