arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1702.08455gr-qc
收藏

具有Horava-Lifshitz引力的FLRW宇宙学:状态方程的影响

FLRW Cosmology with Horava-Lifshitz Gravity: Impacts of Equations of State

A. Tawfik, E. Abou El Dahab

摘要:

受到凝聚态量子临界现象的Lifshitz理论的启发,Horava提出了一个在紫外光中具有各向异性标度的量子引力理论。在Horava-Lifshitz引力(HLG)中,我们研究了六种状态方程对哈勃参数和标度因子等宇宙学参数演化的影响。比较了广义相对论引力与HLG在详细平衡条件和无细致平衡条件下的引力,发现了显著的差别,同时也观察到奇异和非奇异大爆炸对物态方程的显著依赖性。我们的结论是,HLG解释了早期宇宙中的各个时期,并可能能够再现整个宇宙历史与单一的大爆炸。

英文摘要:

Inspired by Lifshitz theory for quantum critical phenomena in condensed matter, Horava proposed a theory for quantum gravity with an anisotropic scaling in ultraviolet. In Horava-Lifshitz gravity (HLG), we have studied the impacts of six types of equations of state on the evolution of various cosmological parameters such as Hubble parameters and scale factor. From the comparison of the general relativity gravity with the HLG with detailed and without with non-detailed balance conditions, remarkable differences are found. Also, a noticeable dependence of singular and non-singular Big Bang on the equations of state is observed. We conclude that HLG explains various epochs in the early universe and might be able to reproduce the entire cosmic history with and without singular Big Bang.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑