pith. sign in

arxiv: 0912.4093 · v2 · pith:MWU23XWVnew · submitted 2009-12-21 · 🌀 gr-qc · astro-ph.CO· hep-th

Loop quantum cosmology and slow roll inflation

classification 🌀 gr-qc astro-ph.COhep-th
keywords quantumrollslowbangbouncecosmologye-foldingsemph
0
0 comments X
read the original abstract

In loop quantum cosmology (LQC) the big bang is replaced by a quantum bounce which is followed by a robust phase of super-inflation. Rather than growing unboundedly in the past, the Hubble parameter \emph{vanishes} at the bounce and attains a \emph{finite universal maximum} at the end of super-inflation. These novel features lead to an unforeseen implication: in presence of suitable potentials all LQC dynamical trajectories are funneled to conditions which virtually guarantee slow roll inflation with more than 68 e-foldings, {without any input from the pre-big bang regime}. This is in striking contrast to certain results in general relativity, where it is argued that the a priori probability of obtaining a slow roll with 68 or more e-foldings is suppressed by a factor $e^{-204}$.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Quasi-dust ekpyrotic scenario in Loop Quantum Cosmology

    gr-qc 2025-09 unverdicted novelty 5.0

    A quasi-dust ekpyrotic two-field model in Loop Quantum Cosmology produces viable primordial power spectra via coupled scalar and tensor perturbations.