Levy, A.M., Ijjas, A. and Steinhardt, P.J. (2015) Scale-Invariant Perturbations in Ekpyrotic Cosmologies without Fine-Tuning of Initial Conditions. Physical Review D, 92, 063524.
https://doi.org/10.1103/PhysRevD.92.063524

has been cited by the following article:

• TITLE: Predicting the Curvature of the Cosmos, and Point of Volume Contraction in a Big Bounce Scenario

  AUTHORS: Christopher Pilot

  KEYWORDS: Cosmic Curvature, Closed Universe, Cyclic Universe, Heat Engine Model for Universe, Big Bounce, Susceptibility Model for Universe, Carnot Cycle Model for Cosmos, Causal Isotropy in CMB Temperature

  JOURNAL NAME: International Journal of Astronomy and Astrophysics, Vol.11 No.2, June 21, 2021

  ABSTRACT: Based on the latest Planck surveys, the universe is close to being remarkably flat, and yet, within observational error, there is still room for a slight curvature. If the curvature is positive, then this would lead to a closed universe, as well as allow for a big bounce scenario. Working within these assumptions, and using a simple model, we predict that the cosmos may have a positive curvature in the amount, Ω0=1.001802, a value within current observational bounds. For the scaling laws associated with the density parameters in Friedmann’s equations, we will assume a susceptibility model for space, where, , equals the smeared cosmic susceptibility. If we allow the to decrease with increasing cosmic scale parameter, “a”, then we can predict a maximum Hubble volume, with minimum CMB temperature for the voids, before contraction begins, as well as a minimum volume, with maximum CMB temperature, when expansion starts. A specific heat engine model for the cosmos is also entertained for this model of a closed universe.