一个不违反零能条件的非奇异闭合弹跳宇宙

IF 1.1 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Revista Mexicana de Astronomia y Astrofisica Pub Date : 2022-04-25 DOI:10.22201/ia.01851101p.2022.58.02.07

N. Ahmed, T. M. Kamel, M. Nouh

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引用次数: 1

摘要

提出了一种物质弹跳熵修正的宇宙学模型。该模型只允许负压力下的正曲率，且不违反零能条件。本文的结果得到了最近一些理论工作的支持，其中正空间曲率和真空能量的结合导致了不违反零能条件的非奇异弹跳。当前模型的一个重要特征是宇宙压力、能量密度和状态方程参数的演化与修正后的熵面积关系中的前因子α和β的值无关。讨论了经典非线性能量条件和新的非线性能量条件的有效性。对宇宙学参数进行了分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A NON-SINGULAR CLOSED BOUNCING UNIVERSE WITHOUT VIOLATION OF NULL ENERGY CONDITION

A matter bouncing entropy-corrected cosmological model has been suggested. The model allows only positive curvature with negative pressure and no violation of the null energy condition. The result obtained in this paper is supported by some recent theoretical works where the combination of positive spatial curvature and vacuum energy leads to non-singular bounces with no violation of the null energy condition. An important feature of the current model is that evolutions of the cosmic pressure, energy density and equation of state parameter are independent of the values of the prefactors α and β in the corrected entropy-area relation. The validity of the classical and the new nonlinear energy conditions has been discussed. The cosmographic parameters have been analyzed.

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来源期刊

Revista Mexicana de Astronomia y Astrofisica 地学天文-天文与天体物理

CiteScore

1.30

自引率

10.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Revista Mexicana de Astronomía y Astrofísica, founded in 1974, publishes original research papers in all branches of astronomy, astrophysics and closely related fields. Two numbers per year are issued and are distributed free of charge to all institutions engaged in the fields covered by the RMxAA.