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arXiv 2003.11369gr-qc
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由DSR-GUP导出的修正Friedmann方程

Modified Friedmann equations from DSR-GUP

Özgür Ökcü, Christian Corda, Ekrem Aydiner

摘要:

考虑DSR-GUP(Doubly狭义相对论-Generalized Uncertainty Principle)修正的熵-面积关系,由热力学热力学第一定律导出了修正的Friedmann方程。由于普朗克尺度下GUP的重要性,我们研究了Friedmann方程,并给出了普朗克尺度下的最大能量密度\r{ho}。由于GUP意味着一个最小的长度,我们找到了一个最小的视视界,它有可能消除大爆炸奇点。进一步分析了DSR-GUP对状态方程p = ω \r{ho}和平板情况下减速参数q的影响。最后,我们检查了广义热力学第二定律(GSL)的有效性,并表明它是有效的宇宙的任何空间曲率的所有时代。

英文摘要:

Considering the modified entropy-area relation from DSR-GUP (Doubly special relativity-Generalized uncertainity principle), we obtain the modified Friedmann equations from the first law of thermodynamics at apparent horizon. Due to the importance of GUP at Planck scale, we investigate the Friedmann equations and show the maximum energy density \r{ho} at Planck scale. Since GUP implies a minimal length, we find a minimum apparent horizon which has a potential to remove the Big Bang singularity. Furthermore, we analyse the effects of DSR-GUP on deceleration parameter q for the equation of state p = ω\r{ho} and the flat case. Finally, we check the validity of the generalized second law (GSL) of thermodynamics and show that it is valid all eras of the Universe for any spatial curvature.

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