Abstract
We study the variation of fundamental constants in cosmology while dealing with thermodynamic aspects of gravity. We focus on the variation of the speed of light, c, and Newton’s gravitational constant, G, with respect to cosmic time. We find the constraints on the possible variation of these constants by comparing varying constants of cosmological models with the latest observational data.
Highlights
One of the most important breakthroughs in the field of black hole physics is the correspondence between the parameters of black holes and the quantities in thermodynamics
We extend the entropic cosmology to the variation of fundamental constants, the varying c and varying G
We have examined many-fluid entropic models against observational data
Summary
One of the most important breakthroughs in the field of black hole physics is the correspondence between the parameters of black holes and the quantities in thermodynamics. The entropic terms are due to the force acting on the boundary of the universe due to the increasing entropy of the universe. This has been criticized on the basis of a galaxy formation problem and some other issues [11,12,13,14]. We briefly summarize the approach given by us in [29] to study the variation of fundamental constants. Dynamical dark energy models with varying fundamental constants have been discussed in [33,34].
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