Sharp Decrease of the Effective Cosmological Constant in the Poincare Gauge Theory of Gravity with Minimal Self-Acting Scalar Field

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

Gravitation and Cosmology Pub Date : 2024-11-22 DOI:10.1134/S0202289324700294

O. V. Babourova, B. N. Frolov

引用次数: 0

Abstract

The stage of a super-early (primordial) Universe is considered on the basis of Poincare gauge theory of gravity in the presence of a cosmological scalar field with an extremely weak self-action. For this purpose, field equations were obtained for a homogeneous and isotropic metric. A solution has been found at which the scale factor experiences an inflationary increase, and the effective cosmological constant has a sharp decrease from a huge value near the Big Bang to a small modern value. This fact solves the “cosmological constant problem.” It is predicted that the effective cosmological constant decreases extremely slowly throughout the lifetime of the Universe.

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具有最小自作用标量场的庞加莱引力计理论中有效宇宙常数的急剧下降

在存在自作用极弱的宇宙学标量场的情况下，以波因卡尔引力规规理论为基础，研究了超早期（原始）宇宙的阶段。为此，我们获得了均质和各向同性度量的场方程。找到了一个解，在这个解中，尺度因子经历了膨胀式增长，有效宇宙常数从大爆炸附近的巨大值急剧下降到很小的现代值。这一事实解决了 "宇宙常数问题"。据预测，在宇宙的整个生命周期中，有效宇宙常数的下降速度极其缓慢。

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