Statefinder diagnostic of logarithmic entropy corrected holographic dark energy with Granda-Oliveros IR cut-off

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作者
A. Khodam-Mohammadi
Antonio Pasqua
M. Malekjani
Iuliia Khomenko
M. Monshizadeh
机构
[1] Bu-Ali Sina University,Physics Department, Faculty of Science
[2] University of Trieste,Department of Physics
[3] National Technical University of Ukraine “Kyiv Politechnical Institute”,Heat
[4] Islamic Azad University,and
[5] Hamedan branch,Power Engineering Department
[6] Shiraz University,Physics Department, Faculty of Science
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Logarithmic entropy corrected; Holographic dark energy; Granda-Oliveros IR cut-off; Statefinder diagnostic;
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摘要
In this work, we have studied the logarithmic entropy corrected holographic dark energy (LECHDE) model with Granda-Oliveros (G-O) IR cutoff. The evolution of dark energy (DE) density \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}${\varOmega}'_{D}$\end{document}, the deceleration parameter, q, and equation of state parameter (EoS), ωΛ, are calculated. We show that the phantom divide may be crossed by choosing proper model parameters, even in absence of any interaction between dark energy and dark matter. By studying the statefinder diagnostic and \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$\omega_{{\varLambda}}-\omega_{{\varLambda}}^{\prime}$\end{document} analysis, the pair parameters {r,s} and \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$(\omega_{{\varLambda}}-\omega_{{\varLambda}}^{\prime})$\end{document} is calculated for flat GO-LECHDE universe. At present time, the pair {r,s} can mimic the ΛCDM scenario for a value of α/β≃0.87, which is lower than the corresponding one for observational data (α/β=1.76) and for Ricci scale (α/β=2). We find that at present, by taking the various values of (α/β), the different points in r−s and \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$(\omega_{{\varLambda}}-\omega_{{\varLambda}}^{\prime})$\end{document} plans are given. Moreover, in the limiting case for a flat dark dominated universe at infinity (t→∞), we calculate {r,s} at G-O scale. For Ricci scale (α=2, β=1) we obtain {r=0,s=2/3}.
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页码:415 / 420
页数:5
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