非正则标量场驱动的DGP宇宙学中的对数直接暴胀

IF 1.2 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Gravitation and Cosmology Pub Date : 2023-04-04 DOI:10.1134/S0202289323010085
A. Ravanpak, G. F. Fadakar
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引用次数: 0

摘要

研究了在DGP膜世界引力框架下非正则标量场驱动的对数直接暴胀的主要性质。考虑高能量条件,分析计算慢滚参数。然后,我们处理了微扰理论,并计算了最重要的参数,如标量谱指数和张量-标量比。我们发现标量波动的谱总是红倾斜的。同时,我们知道标量谱指数的运行接近于零。最后,我们将这种暴胀情景与普朗克2018的最新观测结果进行了比较。
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Logamediate Inflation in DGP Cosmology Driven by a Non-Canonical Scalar Field

The main properties of the logamediate inflation driven by a non-canonical scalar field in the framework of DGP braneworld gravity are investigated. Considering high energy conditions, we analytically calculate the slow-roll parameters. Then, we deal with perturbation theory and calculate the most important respective parameters, such as the scalar spectral index and the tensor-to-scalar ratio. We find that the spectrum of scalar fluctuations is always red-tilted. Also, we understand that the running in the scalar spectral index is nearly zero. Finally, we compare this inflationary scenario with the latest observational results from Planck 2018.

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来源期刊
Gravitation and Cosmology
Gravitation and Cosmology ASTRONOMY & ASTROPHYSICS-
CiteScore
1.70
自引率
22.20%
发文量
31
审稿时长
>12 weeks
期刊介绍: Gravitation and Cosmology is a peer-reviewed periodical, dealing with the full range of topics of gravitational physics and relativistic cosmology and published under the auspices of the Russian Gravitation Society and Peoples’ Friendship University of Russia. The journal publishes research papers, review articles and brief communications on the following fields: theoretical (classical and quantum) gravitation; relativistic astrophysics and cosmology, exact solutions and modern mathematical methods in gravitation and cosmology, including Lie groups, geometry and topology; unification theories including gravitation; fundamental physical constants and their possible variations; fundamental gravity experiments on Earth and in space; related topics. It also publishes selected old papers which have not lost their topicality but were previously published only in Russian and were not available to the worldwide research community
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