Accelerated expansion of the universe based on emergence of space and thermodynamics of the horizon

Accelerated expansion of the universe based on emergence of space and thermodynamics of the horizon
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基于空间出现和地平线热力学的宇宙加速膨胀

DOI:
10.1016/j.physletb.2018.08.030
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发表时间:
2017-07
期刊:
影响因子:
4.4
通讯作者:
Yang You-Chang
Yang You-Chang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Tu Fei-Quan;Chen Yi-Xin;Sun Bin;Yang You-Chang

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几十年来的研究表明,引力动力学与视界热力学密切相关。本文根据“空间涌现”的思想和哈勃视界的热力学推导出弗里德曼加速方程,哈勃视界的温度由统一的热力学第一定律得到。在此基础上,利用能量平衡关系ρ VH = TS导出了另一个宇宙演化方程。结合这两个演化方程和宇宙物质的状态方程,我们得到了FRW宇宙的演化解。我们发现我们得到的解包含了标准广义相对论(GR)中得到的解。因此,用热力学的方法来描述宇宙的演化是比较普遍的。
Researches in the several decades have shown that the dynamics of gravity is closely related to thermodynamics of the horizon. In this paper, we derive the Friedmann acceleration equation based on the idea of “emergence of space” and thermodynamics of the Hubble horizon whose temperature is obtained from the unified first law of thermodynamics. Then we derive another evolution equation of the universe based on the energy balance relation ρ V H= T S. Combining the two evolution equations and the equation of state of the cosmic matter, we obtain the evolution solutions of the FRW universe. We find that the solutions obtained by us include the solutions obtained in the standard general relativity (GR) theory. Therefore, it is more general to describe the evolution of the universe in the thermodynamic way.
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