具有随时间变化的周期性减速参数的振荡五子棋方案

IF 1.5 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Modern Physics Letters A Pub Date : 2023-12-09 DOI:10.1142/s0217732323501717
M. Ilyas, A. R. Athar
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引用次数: 0

摘要

在本文中,我们以不同的方式引入了减速参数[公式:见正文],提出了一个现代定律。根据这一定律,我们提出了一个时间周期[公式:见正文]。此外,我们还利用这一定律建立了一个模型,在这个模型中,宇宙在四维 FLRW 度量背景下与五子物质一起振荡。利用这个模型,我们得到了振荡哈勃参数[公式:见正文],该参数保持为正值。因此,宇宙周期性地经历减速膨胀和加速膨胀,避免了奇点的出现。
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Oscillating quintom scenario with time-dependent periodic deceleration parameter
In this paper, we introduced the deceleration parameter [Formula: see text] in a different manner by proposing a modern law. According to this law, we suggested a time-periodic [Formula: see text]. Furthermore, we used this law to develop a model in which the universe oscillates with quintom matter in a four-dimensional FLRW metric background. Using this model, we obtained the oscillating Hubble parameter [Formula: see text], which remains positive. Consequently, the universe undergoes decelerating expansion and accelerating expansion periodically, avoiding singularities.
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来源期刊
Modern Physics Letters A
Modern Physics Letters A 物理-物理:核物理
CiteScore
3.10
自引率
7.10%
发文量
186
审稿时长
3 months
期刊介绍: This letters journal, launched in 1986, consists of research papers covering current research developments in Gravitation, Cosmology, Astrophysics, Nuclear Physics, Particles and Fields, Accelerator physics, and Quantum Information. A Brief Review section has also been initiated with the purpose of publishing short reports on the latest experimental findings and urgent new theoretical developments.
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