Gravitational Baryogenesis of Cosmological Constant Dominated Universe

IF 1.2 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Gravitation and Cosmology Pub Date : 2021-12-14 DOI:10.1134/S0202289321040137

Sudhir Kumar Srivastava, Ahamad T Ali, Anil Kumar Yadav

引用次数: 0

Abstract

We study gravitational baryogenesis in an isotropic and homogeneous universe in the framework of general relativity. We investigate a new exact solution of Einstein’s field equations for the FRW metric. Our solution represents a transitioning model of the universe which was expanding in a decelerated mode and passes on to an accelerated mode after dominance of the cosmological constant \(\Lambda\). We observe that gravitational baryogenesis occurs in the derived universe, and the derived baryon-entropy ratio is in good agreement with its observational value.

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宇宙常数主导宇宙的引力重子形成

我们在广义相对论的框架下研究了各向同性均匀宇宙中的引力重子发生。我们研究了FRW度规爱因斯坦场方程的一个新的精确解。我们的解代表了宇宙的过渡模型，该模型以减速模式膨胀，并在宇宙常数\(\Lambda\)占主导地位后过渡到加速模式。我们观察到在导出的宇宙中发生了引力重子生成，导出的重子熵比与观测值吻合较好。

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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来源期刊

Gravitation and Cosmology ASTRONOMY & ASTROPHYSICS-

CiteScore

1.70

自引率

22.20%

发文量

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 Peoplesâ€™ 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