AUTHOR=Gozzini Francesco , Vidotto Francesca 

TITLE=Primordial Fluctuations From Quantum Gravity

JOURNAL=Frontiers in Astronomy and Space Sciences

VOLUME=7

YEAR=2021

URL=https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2020.629466

DOI=10.3389/fspas.2020.629466

ISSN=2296-987X

ABSTRACT=<p>We study the fluctuations and the correlations between spatial regions generated in the primordial quantum gravitational era of the universe. We point out that these can be computed using the Lorentzian dynamics defined by the Loop Quantum Gravity amplitudes. We evaluate these amplitudes numerically in the deep quantum regime. Surprisingly, we find large fluctuations and strong correlations, although not maximal. This suggests the possibility that early quantum gravity effects might be sufficient to account for structure formation and solve the cosmological horizon problem.</p>