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Universe 2017, 3(1), 1; doi:10.3390/universe3010001

Bouncing Cosmologies with Dark Matter and Dark Energy

1
CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Chinese Academy of Sciences, 230026 Hefei, China
2
Department of Physics & Center for Field Theory and Particle Physics, Fudan University, 200433 Shanghai, China
3
Leiden Observatory, Leiden University, 2300 RA Leiden, The Netherlands
4
Instituut-Lorentz for Theoretical Physics, Leiden University, 2333 CA Leiden, The Netherlands
5
Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Am Mühlenberg 1, 14476 Golm, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Jaume Haro
Received: 9 October 2016 / Revised: 12 December 2016 / Accepted: 13 December 2016 / Published: 23 December 2016
(This article belongs to the Special Issue Loop Quantum Cosmology and Quantum Black Holes)
View Full-Text   |   Download PDF [338 KB, uploaded 23 December 2016]   |  

Abstract

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. View Full-Text
Keywords: Matter bounce scenario; interacting dark energy; alternatives to inflation Matter bounce scenario; interacting dark energy; alternatives to inflation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Cai, Y.-F.; Marcianò, A.; Wang, D.-G.; Wilson-Ewing, E. Bouncing Cosmologies with Dark Matter and Dark Energy. Universe 2017, 3, 1.

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