Is Planckian Discreteness Observable in Cosmology?
Gabriel R. Bengochea,
Gabriel León,
Alejandro Perez
Affiliations
Gabriel R. Bengochea
Instituto de Astronomía y Física del Espacio (IAFE), Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Universidad de Buenos Aires, Buenos Aires 1428, Argentina
Gabriel León
Grupo de Cosmología, Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, Paseo del Bosque S/N, La Plata 1900, Argentina
Alejandro Perez
CNRS, Centre de Physique Théorique, Aix Marseille Université, Université de Toulon, 13000 Marseille, France
A Planck scale inflationary era—in a quantum gravity theory predicting discreteness of quantum geometry at the fundamental scale—produces the scale-invariant spectrum of inhomogeneities with a very small tensor-to-scalar ratio of perturbations and a hot big bang leading to a natural dark matter genesis scenario. Here, we evoke the possibility that some of the major puzzles in cosmology would have an explanation rooted in quantum gravity.
