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 (32)

• Planck evidence for a closed Universe and a possible crisis for cosmology
• Inflationary spacetimes are not past-complete
• Inflationary Cosmology
• Bouncing Cosmologies: Progress and Problems
• Eternal inflation and the initial singularity
• A Critical Review of Classical Bouncing Cosmologies
• Galilean Genesis: an alternative to inflation
• Cosmology with torsion: An alternative to cosmic inflation
• Is the Low CMB Quadrupole a Signature of Spatial Curvature?
• The Measure Problem in Cosmology
• Probability of Inflation in Loop Quantum Cosmology
• Alternatives to Cosmological Inflation
• Loop quantum cosmology and slow roll inflation
• Using the tilted flat-$\Lambda$CDM and the untilted non-flat $\Lambda$CDM inflation models to measure cosmological parameters from a compilation of observational data
• An Alternative to Inflation
• WMAP data and the curvature of space
• Measure and Probability in Cosmology
• Duration of inflation and conditions at the bounce as a prediction of effective isotropic loop quantum cosmolog
• What can the observation of nonzero curvature tell us?
• On the "Causality Argument" in Bouncing Cosmologies
• Primordial scalar power spectrum from the Euclidean Big Bounce
• Bouncing alternatives to inflation
• The Oscillating Universe: an Alternative to Inflation
• Detailed investigation of the duration of inflation in loop quantum cosmology for a Bianchi-I universe with different inflaton potentials and initial conditions
• Inflation in the closed FLRW model and the CMB
• Stochastic eternal inflation is in the swampland
• Bouncing Universe from Nothing
• Some Clarifications on the Duration of Inflation in Loop Quantum Cosmology
• Exhaustive investigation of the duration of inflation in effective anisotropic loop quantum cosmology
• Where was past low-entropy?
• Tensor perturbations during inflation in a spatially closed Universe
• Seeing through the cosmological bounce: Footprints of the contracting phase and luminosity distance in bouncing models

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• Curvature bounce in general relativity: background and primordial spectrum
• Impact of generalized holonomy corrections on the cosmological primordial power spectra
• Catastrophic fate of Schwarzschild black holes in a thermal bath
• Emergent universe revisited through the CSL theory
• Emergent universe: tensor perturbations within the CSL framework
• Detailed analysis of the curvature bounce: background dynamics and imprints in the CMB