Wednesday 11 July 2018

cosmology - What caused the expansion of the universe to slow down after the inflationary epoch?


As everyone knows, when the big bang happened, the universe expanded at an unbelievable rate and this was called the inflationary epoch (or more popularly cosmological inflation) which lasted for about $10^-$$^3$$^4$ seconds. But after that, the rate of expansion suddenly reduced and is now gradually increasing. Can someone tell me what is the probable reason or the resistive force that caused expansion to slow down greatly after the big bang?


The question is based on the simple fact that expansion could not have slowed down if there was no resistive force acting or more simply inertia of motion.




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