Thermodynamical Aspects of Some Cosmological Models - INSPIRE

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Thermodynamical Aspects of Some Cosmological Models

Tanima Duary

Jun 3, 2024

e-Print:

2406.01770 [gr-qc]

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Abstract: (arXiv)

The research work in the thesis is focused on the thermodynamic analysis of cosmological models, especially the models that explain late-time cosmic acceleration. According to the cosmological principle, the universe is spatially homogeneous and isotropic. FRW metric is considered to describe it. In the initial chapter, an overview of cosmology is presented. Chapter 2 delves into thermodynamics applied to cosmology, emphasizing the Generalized Second Law. It thoroughly covers Hayward-Kodama temperature and discusses the apparent horizon and the conditions for thermodynamic stability. Chapter 3 presents a thermodynamic comparison of quintessence models, focusing on thawing and freezing scenarios. Chapter 4 examines Brans-Dicke cosmological models in a spatially isotropic and homogeneous universe, assessing their compatibility with the Generalized Second Law of Thermodynamics. Chapter 5 explores the thermodynamic viability of various dark energy models reconstructed using the cosmological jerk parameter. Chapter 6 examines a model in a spatially flat FRW spacetime that mimics the characteristics of the

\Lambda

CDM model, assessing its thermodynamic stability. Chapter 7 serves as the epilogue of this thesis, offering not only the final conclusions but also a brief discussion on the presented work and potential future prospects.

Note:

Thesis accepted for the award of PhD degree of IISER Kolkata, April 2024

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