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Symmetry 2018, 10(5), 153;

New Holographic Dark Energy Model in Brans-Dicke Theory

Department of Mathematics, University of the Punjab, Quaid-e-Azam Campus, Lahore 54590, Pakistan
Division of Human Support System, Faculty of Symbiotic Systems Science, Fukushima University, Fukushima 960-1296, Japan
Author to whom correspondence should be addressed.
Received: 17 April 2018 / Revised: 4 May 2018 / Accepted: 4 May 2018 / Published: 11 May 2018
(This article belongs to the Special Issue Cosmological Inflation, Dark Matter and Dark Energy)
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We study the cosmic evolution of the Bianchi type I universe by using new holographic dark energy model in the context of the Brans-Dicke theory for both non-interacting and interacting cases between dark energy and dark matter. We evaluate the equation of state for dark energy ω D and draw the ω D ω ˙ D plane, where the dot denotes the time derivative. It is found that a stage in which the cosmic expansion is accelerating can be realized in both cases. In addition, we investigate the stability of the model by analyzing the sound speed. As a result, it is demonstrated that for both cases, the behavior of the sound speed becomes unstable. Furthermore, with the Om-diagnostic tool, it is shown that the quintessence region of the universe can exist. View Full-Text
Keywords: brans-dicke theory; dark energy model; cosmological parameters brans-dicke theory; dark energy model; cosmological parameters

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Sharif, M.; Asif Ali Shah, S.; Bamba, K. New Holographic Dark Energy Model in Brans-Dicke Theory. Symmetry 2018, 10, 153.

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