The Friedmann Paradigm: A critical review - General Relativity and Quantum CosmologyReport as inadecuate




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Abstract: The Friedmann paradigm for a dynamical universe emanating from a spacetimesingularity is critically reviwed. Quantum effects, playing the essential roleat the very early stages, suggests that the universe may follow differentcourse to that presented by the standard Friedmann solutions. The investigationof the back-reaction effect of the vacuum energy of quantized massless matterfields at finite temperatures shows that the original spatial singularity isavoided and that the universe is maintained all times at a critical density.Instead of having a universe that was created at once we have an emergentuniverse with energy being created continuously so as to maintain the overalldensity at its critical value. The calculations presented here provide a basisto construct a dynamical model for the universe where all the known problems ofthe standard big bang can be avioded from start without the need to assume theoccurence of an inflation phase.



Author: M.B. Altaie

Source: https://arxiv.org/



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