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Universe 2015, 1(1), 24-37; doi:10.3390/universe1010024

Inhomogeneous Dark Fluid and Dark Matter, Leading to a Bounce Cosmology

1
Department of Energy and Process Engineering, Norwegian University of Science and Technology, N-7491 Trondheim, Norway
2
Tomsk State Pedagogical University, ul. Kievskaya, 60, 634061 Tomsk, Russia
*
Author to whom correspondence should be addressed.
Academic Editors: Kazuharu Bamba and Sergei D. Odintsov
Received: 24 January 2015 / Revised: 26 February 2015 / Accepted: 9 March 2015 / Published: 16 March 2015
(This article belongs to the Special Issue Modified Gravity Cosmology: From Inflation to Dark Energy)
View Full-Text   |   Download PDF [250 KB, uploaded 16 March 2015]

Abstract

The purpose of this short review is to describe cosmological models with a linear inhomogeneous time-dependent equation of state (EoS) for dark energy, when dark fluid is coupled with dark matter. This may lead to a bounce cosmology. We consider equivalent descriptions in terms of the EoS parameters for an exponential, a power-law, or a double-exponential law for the scale factor a. Stability issues are discussed by considering small perturbations around the critical points for the bounce, in the early as well as in the late, universe. The latter part of the paper is concerned with dark energy coupled with dark matter in viscous fluid cosmology. We allow the bulk viscosity ζ = ζ(H, t) to be a function of the Hubble parameter and the time, and consider the Little Rip, the Pseudo Rip, and the bounce universe. Analytic expressions for characteristic properties of these cosmological models are obtained. View Full-Text
Keywords: dark energy; viscous cosmology; bounce cosmology dark energy; viscous cosmology; bounce cosmology
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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Brevik, I.; Timoshkin, A. Inhomogeneous Dark Fluid and Dark Matter, Leading to a Bounce Cosmology. Universe 2015, 1, 24-37.

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