来自非局部引力局部极限的动态暗能量

IF 1.8 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

International Journal of Modern Physics D Pub Date : 2023-05-12 DOI:10.1142/s0218271823420099

J. Tabatabaei, Abdolali Banihashemi, S. Baghram, B. Mashhoon

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引用次数: 2

摘要

非局部引力(NLG)是爱因斯坦引力理论的经典扩展，主要以线性化形式进行研究。特别是，非线性迄今为止阻碍了NLG中宇宙学模型的处理。本文讨论了NLG的局部极限，并将此极限应用于膨胀的齐次各向同性宇宙。该理论只允许空间平坦的宇宙模型;此外，德西特时空是被禁止的。与标准的λ CDM模型相比，模型的组成部分在宇宙时间方面将具有不同的动力学;具体来说，为了解释宇宙膨胀的加速阶段，修正的宇宙平面模型包含了一个动态暗能量成分，而不是宇宙常数。

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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Dynamic Dark Energy from the Local Limit of Nonlocal Gravity

Nonlocal gravity (NLG), a classical extension of Einstein's theory of gravitation, has been studied mainly in linearized form. In particular, nonlinearities have thus far prevented the treatment of cosmological models in NLG. In this essay, we discuss the local limit of NLG and apply this limit to the expanding homogenous and isotropic universe. The theory only allows spatially flat cosmological models; furthermore, de Sitter spacetime is forbidden. The components of the model will have different dynamics with respect to cosmic time as compared to the standard $\Lambda$CDM model; specifically, instead of the cosmological constant, the modified flat model of cosmology involves a dynamic dark energy component in order to account for the accelerated phase of the expansion of the universe.

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来源期刊

International Journal of Modern Physics D 地学天文-天文与天体物理

CiteScore

3.80

自引率

9.10%

发文量

181

审稿时长

4-8 weeks

期刊介绍： Gravitation, astrophysics and cosmology are exciting and rapidly advancing fields of research. This journal aims to accommodate and promote this expansion of information and ideas and it features research papers and reviews on theoretical, observational and experimental findings in these fields. Among the topics covered are general relativity, quantum gravity, gravitational experiments, quantum cosmology, observational cosmology, particle cosmology, large scale structure, high energy astrophysics, compact objects, cosmic particles and radiation.