Cosmological Analysis of Pilgrim Dark Energy in Loop Quantum Cosmology

Abstract

The proposal of pilgrim dark energy is based on speculation that phantom-like dark energy (with strong enough resistive force) can prevent black hole formation in the universe. We explore this phenomenon in loop quantum cosmology framework by taking Hubble horizon as an infra-red cutoff in pilgrim dark energy. We evaluate the cosmological parameters such as Hubble, equation of state parameter, squared speed of sound and also cosmological planes like ${\omega }_{\vartheta }-{\omega }_{\vartheta }^{\prime }$ and $r-s$ on the basis of pilgrim dark energy parameter ($u$) and interacting parameter ($d^2$). It is found that values of Hubble parameter lies in the range $74_{-0.005}^{+0.005}$. It is mentioned here that equation state parameter lies within the ranges $-1\mp 0.00005$ for $u=2,1$ and $(-1.12,-1),(-5,-1)$ for $u=-1,-2$, respectively. Also, ${\omega }_{\vartheta }-{\omega }_{\vartheta }^{\prime }$ planes provide $\Lambda$CDM limit, freezing and thawing regions for all cases of $u$. It is also interesting to mention here that ${\omega }_{\vartheta }-{\omega }_{\vartheta }^{\prime }$ planes lie in the range (${\omega }_{\vartheta }=-1.13_{-0.25}^{+0.24},{\omega }_{\vartheta }^{\prime }<1.32$). In addition, $r-s$ planes also corresponds to $\Lambda$CDM for all cases of $u$. Finally, it is remarked that all the above constraints of cosmological parameters shows consistency with different observational data like Planck, WP, BAO, $H_0$ and SNLS.

arXiv comment22 pages, 20 Figures

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• Cosmological Consequences of New Dark Energy Models in Einstein-Aether Gravity