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A Wheeler-DeWitt guide through cosmological singularities

Cosmology, Physical Cosmology and seminar by Federico Piazza, Aix-Marseille University

Hosted by Perimeter Institute Recorded Seminar Archive

Tuesday 11:00 UTC

Recording available

Waterloo, Canada
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Recording

1 h 1 min

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