1 h 1 min
A Wheeler-DeWitt guide through cosmological singularities
Cosmology, Physical Cosmology and seminar by Federico Piazza, Aix-Marseille University
Tuesday 11:00 UTC
Recording available
Waterloo, Canada
Recording
Abstract
Can quantum uncertainty resolve cosmological singularities within the Wheeler–DeWitt description itself? Introducing an observer's proper time turns the problem into evolution resembling scattering in a central potential. The talk describes a smooth quantum bounce for a radiation-filled universe, with large scale-factor uncertainty, and explains why anisotropy introduces a critical attractive potential. That harder regime motivates extending the classical BKL account of singularities into quantum theory.
Topics
quantum uncertaintycosmological singularitiesWheeler–DeWittobserver's proper timequantum bounceradiation-filled universescale-factor uncertaintyanisotropycritical attractive potentialBKL