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Natural validation of the second law of thermodynamics in cosmology
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abstract
The present work shows that the second law of thermodynamics gets naturally satisfied during the entire cosmic evolution of the universe starting from inflation to the late dark energy era, without imposing any exotic condition. This makes the inter-connection between cosmology and thermodynamics more concrete. Consequently, it also depicts that why the matter fields are not in thermal equilibrium with the apparent horizon during most of the cosmic era of the universe, except for the fluids with $\omega = -1/3$ leading to the transitions of the universe from an accelerating to a decelerating era and vice-versa.
Forward citations
Cited by 2 Pith papers
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Viscosity in Isotropic Cosmological Backgrounds in General Relativity and Starobinsky Gravity
Shear viscosity does not affect the background expansion or the electromagnetic luminosity distance in isotropic cosmologies with a comoving fluid, also in Starobinsky gravity.
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Dark energy era with a resolution of Hubble tension in generalized entropic cosmology
A generalized-entropy dark energy model with one fitted extra parameter returns H0 near 73 km/s/Mpc on some datasets, but the reported model-comparison statistics do not favor it over LambdaCDM.
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