Dynamics of some cosmological solutions in modified f(T, B) theory of gravity

IF 2.8 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY The European Physical Journal Plus Pub Date : 2024-11-21 DOI:10.1140/epjp/s13360-024-05807-7

Adnan Malik, Aimen Rauf, V. Venkatesha, Chaitra Chooda Chalavadi, Shahid Chaudhary

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Abstract

The aim of this manuscript is to explore cosmological solutions using the modified f(T, B) theory of gravity, where B represents the boundary scalar term and T represents the torsion scalar. For our current work, we consider the Friedmann–Robertson–Walker spacetime to obtain solutions. We investigate the nature of the universe under various scenarios, including acceleration expansion of universe, ultra-relativistic universe, sub-relativistic universe, dust universe, radiation universe and stiff universes. Moreover, we choose power-law technique to study the expanding nature of the universe by taking two different f(T, B) gravity models. Additionally, we discuss the bouncing scenario of universe and observe the energy conditions, which must be satisfied for a successful bouncing model by selecting particular values for the model parameters. It can be concluded that some solutions in f(T, B) gravity models support the concept of exotic matter and accelerated expansion of the universe due to a large amount of negative pressure.

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修正的 f（T，B）引力理论中某些宇宙学解的动力学特性

本手稿的目的是利用修正的 f（T，B）引力理论探索宇宙学解法，其中 B 代表边界标量项，T 代表扭转标量。在我们目前的工作中，我们考虑在弗里德曼-罗伯逊-沃克时空（Friedmann-Robertson-Walker spacetime）中求解。我们研究了宇宙加速膨胀、超相对论宇宙、亚相对论宇宙、尘埃宇宙、辐射宇宙和僵化宇宙等各种情况下的宇宙性质。此外，我们选择了幂律技术，通过两种不同的 f(T, B) 引力模型来研究宇宙的膨胀性质。此外，我们还讨论了宇宙的反弹情况，并通过选择模型参数的特定值观察了成功的反弹模型必须满足的能量条件。可以得出的结论是，f（T，B）引力模型中的一些解支持奇异物质的概念，以及由于大量负压导致的宇宙加速膨胀。

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来源期刊

The European Physical Journal Plus PHYSICS, MULTIDISCIPLINARY-

CiteScore

5.40

自引率

8.80%

发文量

1150

审稿时长

4-8 weeks

期刊介绍： The aims of this peer-reviewed online journal are to distribute and archive all relevant material required to document, assess, validate and reconstruct in detail the body of knowledge in the physical and related sciences. The scope of EPJ Plus encompasses a broad landscape of fields and disciplines in the physical and related sciences - such as covered by the topical EPJ journals and with the explicit addition of geophysics, astrophysics, general relativity and cosmology, mathematical and quantum physics, classical and fluid mechanics, accelerator and medical physics, as well as physics techniques applied to any other topics, including energy, environment and cultural heritage.