Holographic dark energy with time varying \(c^2\) parameter

We consider the holographic dark energy model in which the model parameter \(c^2\) evolves slowly with time. First we calculate the evolution of EoS parameter as well as the deceleration parameter in this generalized version of holographic dark energy (GHDE). Depending on the parameter \(c^2\), the...

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Bibliographic Details
Published in:arXiv.org 2012-10
Main Authors: Malekjani, M, Zarei, R, Honari-Jafarpour, M
Format: Article
Language:English
Subjects:
Dark energy
Deceleration
Diagnostic systems
Evolution
Flux density
Mathematical models
Parameters
Phase transitions
Time dependence
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Summary:We consider the holographic dark energy model in which the model parameter \(c^2\) evolves slowly with time. First we calculate the evolution of EoS parameter as well as the deceleration parameter in this generalized version of holographic dark energy (GHDE). Depending on the parameter \(c^2\), the phantom regime can be achieved earlier or later compare with original version of holographic dark energy. The evolution of energy density of GHDE model is investigated in terms of parameter \(c^2\). We also show that the time-dependency of \(c^2\) can effect on the transition epoch from decelerated phase to accelerated expansion. Finally, we perform the statefinder diagnostic for GHDE model and show that the evolutionary trajectories of the model in \(s-r\) plane are strongly depend on the parameter \(c^2\).
ISSN:2331-8422
DOI:10.48550/arxiv.1209.1089