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arXiv 0905.4117hep-thastro-ph.COgr-qchep-ph
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Horava-Lifshitz引力理论中宇宙模型的热力学和分类

Thermodynamics and classification of cosmological models in the Horava-Lifshitz theory of gravity

Anzhong Wang, Yumei Wu

摘要:

本文研究了Horava-Lifshitz引力理论中的宇宙学模型的热力学,系统地研究了充满状态方程为$p=wρ$的理想流体的宇宙的演化,其中$p$和$ρ$分别表示流体的压力和能量密度,$w$为任意实常数.根据模型中所涉及的自由参数的具体值,我们将所有模型分类为各种情况。在每种情况下的演化的主要属性进行了详细研究,包括减速和/或加速的时期,以及大爆炸,大紧缩,和大撕裂奇点的存在。我们特别关注可能产生弹跳宇宙的模型。

英文摘要:

We study thermodynamics of cosmological models in the Horava-Lifshitz theory of gravity, and systematically investigate the evolution of the universe filled with a perfect fluid that has the equation of state $p=wρ$, where $p$ and $ρ$ denote, respectively, the pressure and energy density of the fluid, and $w$ is an arbitrary real constant. Depending on specific values of the free parameters involved in the models, we classify all of them into various cases. In each case the main properties of the evolution are studied in detail, including the periods of deceleration and/or acceleration, and the existence of big bang, big crunch, and big rip singularities. We pay particular attention on models that may give rise to a bouncing universe.

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。

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