https://doi.org/10.1140/epjc/s10052-020-8158-5
Regular Article - Theoretical Physics
A pure general relativistic non-singular bouncing origin for the Universe
Laboratoire de Physique Subatomique et de Cosmologie, Université Grenoble-Alpes, CNRS/IN2P3, 53, avenue des Martyrs, 38026, Grenoble Cedex, France
* e-mail: barrau@in2p3.fr
Received:
22
May
2020
Accepted:
15
June
2020
Published online:
29
June
2020
In this article, we argue that the past of the Universe, extrapolated from standard physics and measured cosmological parameters, might be a non-singular bounce. We also show that, in this framework, quite stringent constraints can be put on the reheating temperature and number of inflationary e-folds, basically fixing 
and 
. We draw some conclusions about the shape of the inflaton potential and raise the “naturalness” issue in this context. Finally, we argue that this could open a very specific window on the “pre big bounce" universe.
© The Author(s), 2020
