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arXiv 2207.09458gr-qc
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粒子视界加速产生的全息暗能量

Holographic Dark Energy from Acceleration of Particle Horizon

H. R. Fazlollahi

摘要:

根据暗能量的能量密度与事件视界面积成反比的全息原理,我们提出了一种新的暗能量的能量密度,它是通过粒子视界的加速与这个参数的长度成比例的。该模型仅依赖于一个自由参数beta=0-1.99。当β值接近于零时,该模型与Lambda CDM模型相比的偏差是明显的,而当β值=1.99时,所建议的模型与Lambda CDM理论没有冲突。无论β值如何,该模型呈现的暗能量在高红移=0.33时表现为正压物质,而对于现在和不久的将来,宇宙则像宇宙学常数模型和幻影场一样对待。通过与Ricci暗能量模型的比较,说明我们的模型消除了Ricci暗能量在计算老超新星年龄和高红移中不同宇宙组分演化时的误差。此外,我们还计算了该模型的物质结构形成参数,如CMB温度和物质功率谱,以考虑物质主导时代类物质暗能量的影响。

英文摘要:

Following the holographic principle, which suggests that the energy density of dark energy may be proportional inversely to the area of the event horizon of the Universe, we have proposed a new energy density of dark energy through the acceleration of particle horizon scaled by the length of this parameter. This model depends only on one free parameter beta=0-1.99. For beta's near zero, the deviation of the model compared with the Lambda CDM model is tangible while for values beta=1.99, the suggested model has no conflict with Lambda CDM theory. Regardless of the value of beta, the model presents dark energy that behaves such as matter with positive pressure in high redshifts =0.33, while for present and near-future Universe treats like the cosmological constant model and phantom field. Comparing the model with Ricci dark energy illustrates our model alleviates Ricci dark energy errors in calculating the age of old supernovae and the evolution of different cosmic components in high redshifts. Moreover, we have calculated matter structure formation parameters such as CMB temperature and matter power spectrum of the model to consider the effects of matter-like dark energy during the matter-dominated era.

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