The way i read it : Our theoretical framework, allowing matter creation (*) provides a possible origin for the universe (without the need of a Big Bang). Also this is quite timely in the actual context of new observations made by the James Webb space telescope that are in tention with classical models.
(*)(after an hypothetical inflatory period, […or at any time as long as the universe expands…])
title of this post is taken from section : VII. SUMMARY
Of :
Cosmological Particle Production: A Review
Preprint :
(2021 December 7 // @ arXiv…)
https://arxiv.org/pdf/2112.02444.pdf
The article has been published in a peer reviewed journal paywall warning.
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