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arXiv 2107.04869gr-qc
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表观视界熵和广义热力学第二定律的统计方法

Statistical approaches on the apparent horizon entropy and the generalized second law of thermodynamics

Everton M. C. Abreu, Jorge Ananias Neto

摘要:

本文研究了修正Rényi熵(MRE)、Sharma-Mittal熵(SME)和对偶Kaniadakis熵(DKE)三种非高斯熵在广义热力学第二定律(GSL)破坏研究中的作用. GSL是黑洞第二定律的推广。最近,当视视界用巴罗熵描述时,总熵是视视界所包围的熵加上视界本身的熵之和。人们假设宇宙充满了物质和暗能量流体。在这里,将通过MRE、SME和DKE提案来描述明显的地平线。由于GSL对通常的熵成立,但在扩展熵中它是有条件违反的,这意味着这些熵的参数应该被约束在小的值中,以满足GSL。因此,我们已经建立了热力学第二定律可以或不可以遵守的条件,考虑这三个统计概念,就像在巴罗熵中一样。考虑到$ΛCDM$宇宙学,我们可以观察到,对于MRE,SME和DKE,热力学的GSL不服从小的红移值。

英文摘要:

In this work we have investigated the effects of three nongaussian entropies, namely, the modified Rényi entropy (MRE), the Sharma-Mittal entropy (SME) and the dual Kaniadakis entropy (DKE) in the investigation of the generalized second law (GSL) of thermodynamics violation. The GSL is an extension of the second law for black holes. Recently, it was concluded that a total entropy is the sum of the entropy enclosed by the apparent horizon plus the entropy of the horizon itself when the apparent horizon is described by the Barrow entropy. It was assumed that the universe is filled with matter and dark energy fluids. Here, the apparent horizon will be described by MRE, SME, and then by DKE proposals. Since GSL holds for usual entropy, but it is conditionally violated in the extended entropies, this implies that the parameter of these entropies should be constrained in small values in order for the GSL to be satisfied. Hence, we have established conditions where the second law of thermodynamics can or cannot be obeyed considering these three statistical concepts just as it was made in Barrow's entropy. Considering the $ΛCDM$ cosmology we can observe that for MRE, SME and DKE, the GSL of thermodynamics is not obeyed for small redshift values.

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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