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arXiv 1502.06345gr-qc
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圈量子宇宙学中朝圣者暗能量的宇宙学分析

Cosmological Analysis of Pilgrim Dark Energy in Loop Quantum Cosmology

Abdul Jawad

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22 pages, 20 Figures
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摘要：

朝圣者暗能量的提议是基于这样的猜测，即幽灵般的暗能量（具有足够强的阻力）可以阻止宇宙中黑洞的形成。我们在圈量子宇宙学框架下，以哈勃视界作为朝圣者暗能量的红外截止点，对这一现象进行了探讨。我们在朝圣者暗能量参数（$u$）和相互作用参数（$d^2$）的基础上评估了哈勃、状态方程参数、声速平方等宇宙学参数以及$ω_{\vartheta}-ω'_{\vartheta}$和$r-s$等宇宙学平面。发现哈勃参数的取值范围为$74^{+0.005}_{-0.005}$。这里提到，方程状态参数分别位于$u=2, 1$的$-1\mp0.00005$和$u=-1,-2$的$(-1.12,-1), (-5,-1)$的范围内。此外，$ω_{\vartheta}-ω'_{\vartheta}$平面提供了所有$u$情况下的$Λ$ CDM限值、冷冻和解冻区域。在此还值得一提的是，$ω_{\vartheta}-ω'_{\vartheta}$平面位于（$ω_{\vartheta}=-1.13^{+0.24}_{-0.25}, ω'_{\vartheta}<1.32$）范围内。另外，对于$u$的所有情况，$r-s$平面也对应于$Λ$ CDM。最后指出，上述宇宙学参数的约束与Planck、WP、BAO、$H_0$和SNLS等观测数据一致。

英文摘要：

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 $ω_{\vartheta}-ω'_{\vartheta}$ 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 $-1\mp0.00005$ for $u=2, 1$ and $(-1.12,-1), (-5,-1)$ for $u=-1,-2$, respectively. Also, $ω_{\vartheta}-ω'_{\vartheta}$ planes provide $Λ$CDM limit, freezing and thawing regions for all cases of $u$. It is also interesting to mention here that $ω_{\vartheta}-ω'_{\vartheta}$ planes lie in the range ($ω_{\vartheta}=-1.13^{+0.24}_{-0.25}, ω'_{\vartheta}<1.32$). In addition, $r-s$ planes also corresponds to $Λ$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.

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