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arXiv 2504.03470gr-qcastro-ph.HEhep-th
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带空间曲率的广义熵暗能量

Generalized entropic dark energy with spatial curvature

Sergei D. Odintsov, Simone D'Onofrio, Tanmoy Paul

AI总结:

本文在空间非平坦宇宙中基于表观视界的4参数广义熵构建了暗能量模型,推导出暗能量分数密度和状态方程参数的解析形式,并通过数据集对比验证了其在解决哈勃张力问题上的现象学可行性。

摘要:

在表观视界热力学领域,我们在空间非平坦宇宙中,基于表观视界的4参数广义熵构建了一个暗能量(DE)模型。特别地,考虑到宇宙的非零空间曲率,我们以闭合解析形式确定了暗能量分数密度和暗能量状态方程(EoS)参数(对应于4参数广义熵)。结果表明,该模型能够描述宇宙正确的热历史,呈现物质和暗能量时期的序列。与$Λ$CDM模型相比,所提出的广义熵暗能量模型在特定熵参数范围内提供了更高的当前哈勃参数值,从而可能解决哈勃张力问题。这进而导致宇宙具有正的空间曲率。我们将该模型与CC & BAO、Pantheon+ & SH0ES以及CC & BAO & Pantheon+ & SH0ES数据集的联合分析进行对比,这清楚地表明,对于某些最佳拟合的熵参数值,本模型具有现象学上的可行性,且这些值确实与解决哈勃张力问题相一致。

英文摘要:

In the realm of thermodynamics of apparent horizon, we construct a dark energy (DE) model from 4-parameter generalized entropy of apparent horizon in a spatially non-flat universe. In particular, considering a non-zero spatial curvature of the universe, we determine the dark energy fractional density and the dark energy equation of state (EoS) parameter (corresponding to the 4-parameter generalized entropy) in closed analytic forms. It turns out that the scenario can describe the correct thermal history of the universe, with the sequence of matter and dark energy epochs. Comparing with the $Λ$CDM model, the proposed generalized entropic DE model provides a higher value of the present Hubble parameter for a certain range of entropic parameter(s) leading to a possible resolution of the Hubble tension issue. This in turn leads to a positive spatial curvature of the universe. We confront the scenario with CC \& BAO, Pantheon+ \& SH0ES and joint analysis of the CC \& BAO \& Pantheon+ \& SH0ES datasets, which clearly depicts the phenomenological viability of the present model for some best fitted values of entropic parameter(s) that are indeed consistent with the resolution of Hubble tension.

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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