Primordial Fluctuations From Quantum Gravity

Frontiers in Astronomy and Space Sciences

Francesca Vidotto¹  Francesco Gozzini² 

[1] London, ON, Canada;Marseille, France;

关键词: quantum gravity;    cosmology;    structure formation;    spinfoam;    spinfoam cosmology;    horizon problem;    loop quantum gravity;   

DOI  :  10.3389/fspas.2020.629466

来源: Frontiers

【 摘 要 】

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.

【 授权许可】

CC BY