Figure 1
APS/Alan Stonebraker

Figure 1: Scheme of the evolution of the Universe according to the model of Agullo et al., based on a loop-quantum-gravity (LQG) extension of the inflationary paradigm (figure is not to scale). LQG is used to describe the early Universe of the Planck era. The authors show that their theory smoothly connects with conventional inflationary cosmology, delivering similar predictions regarding the observable cosmic microwave background. The model is based on a “big bounce” instead of a big bang: a transition from a contracting to an expanding phase of the Universe.