Browsing by Author "SP19-RMT-021"

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    Cosmic Thermodynamics of Matter Creation Models in Alternative Theories of Gravity
    (LHR TP 6477, 2020) Farzan Mushtaq; SP19-RMT-021; LHR TP 6477; Dr. Shamaila Rani
    This thesis is devoted to study some cosmological models in the scenar- ios of two gravitational theories like fractal universe model and dynamical Chern-Simons modi¯ed theory in particle creation mechanism. In the case of fractal universe model, we consider particle creation rate as constant and variable with two models. We use Gibbs equation to ¯nd out pressure of particle creation rate adiabatic matter phenomenon. For these cases, cosmological parameters like e®ective equation of state and deceleration parameter are studied. Also, we investigate the behavior of generalized sec- ond law of thermodynamics for Barrow entropy by taking constant particle creation rate. For dynamical Chern-Simons theory, two variable particle creation rate models are used for which we explore e®ective equation of state parameter and deceleration parameter.