A pure general relativistic non-singular bouncing origin for the Universe

Abstract

In this letter, 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 $T_{RH}\sim T_{GUT}$ and $N\sim 70$. 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.

References in corpus (10)

• Planck evidence for a closed Universe and a possible crisis for cosmology
• Inflationary Cosmology
• A Critical Review of Classical Bouncing Cosmologies
• Galilean Genesis: an alternative to inflation
• Cosmology with torsion: An alternative to cosmic inflation
• The Measure Problem in Cosmology
• Measure and Probability in Cosmology
• Bouncing Universe from Nothing
• Exhaustive investigation of the duration of inflation in effective anisotropic loop quantum cosmology
• Seeing through the cosmological bounce: Footprints of the contracting phase and luminosity distance in bouncing models