English

Loop quantum cosmology and slow roll inflation

General Relativity and Quantum Cosmology 2014-11-20 v2 Cosmology and Nongalactic Astrophysics High Energy Physics - Theory

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 e204e^{-204}.

Keywords

Cite

@article{arxiv.0912.4093,
  title  = {Loop quantum cosmology and slow roll inflation},
  author = {Abhay Ashtekar and David Sloan},
  journal= {arXiv preprint arXiv:0912.4093},
  year   = {2014}
}

Comments

5 pages, 1 table

R2 v1 2026-06-21T14:26:36.051Z