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arXiv 1502.01843gr-qc
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宇宙的$(3+1)-d$性质是热力学的必然性吗?

Is the $(3+1)-d$ nature of the universe a thermodynamic necessity?

Julian Gonzalez-Ayala, F. Angulo-Brown

摘要:

在早期,早在辐射-物质相等之前,宇宙就可以用一个空间平坦的、只有辐射的模型来描述。本文把整个原始宇宙看作是$n-$维欧氏空间中的黑体辐射(BBR)系统。我们提出宇宙的$(3+1)-d$性质可能是源于热力学第二定律的一种热力学选择原理的结果。关于三个空间维度,我们认为它们是通过每超体积单位的亥姆霍兹自由能的最小化来选择的,而时间维度,正如众所周知的那样,是封闭系统的熵增量原理的结果;也就是所谓的时间箭头。

英文摘要:

It is well established that at early times, long before the time of radiation-matter equality, the universe could have been well described by a spatially flat, radiation only model. In this letter we consider the whole primeval universe as a black body radiation (BBR) system in an $n-$dimensional Euclidean space. We propose that the $(3+1)-d$ nature of the universe could be the result of a kind of thermodynamic selection principle stemming from the second law of thermodynamics. In regard the three spatial dimensions we suggest that they were chosen by means of the minimization of the Helmholtz free energy per hypervolume unit, while the time dimension, as it is well known was the result of the principle of increment of entropy for closed systems; that is, the so-called arrow of time.

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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