M. Ilyas, Fawad Khan, Mona Mohamoud, Kottakkaran Sooppy Nisar, Abdel-Haleem Abdel-Aty, Sabahat Mahnoor, Tooba Leghari, M. Tauqeer
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引用次数: 0
Abstract
This study offers a probable solution to the singularity problems borne with the conventional Big Bang cosmology by analyzing the dynamics of a bouncing cosmological model within the paradigm of a remodeled gravity framework. We peruse the cosmic bounce conditions and denote the cosmological parameters as functions of cosmic time. Furthermore, we employ the redshift parameter and express the cosmological parameters in terms of redshift graphically to remodel an \(f(R)\) gravity model. An accelerated attribute of the Universe expansion is unveiled through these graphs. We ultimately reconstruct the \(f(R)\) gravity model for a genuinely bouncing cosmology corresponding to a hyperbolic scale factor. Conclusively, we analyze the speed of sound to explore stability. The late-time stability is proved by plots of the sound speed against redshift.
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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