Résumé / Abstract Seminaire_GReCO
SÉMINAIRE DU GRECO

"Quantum singularity avoidance and Bianchi I clocks"

Patrick Peter
Institut d'Astrophysique de Paris (Paris, France)

There are ways to cure the singularity problem in cosmology
by means of quantum effects. In the process, one encounters
the question of time, which can for instance be addressed by
using an internal degree of freedom. Applying such a method
to an anisotropic Bianchi I model where the shear serves as a
clock, we show that some generic features can be obtained for
the trajectory of the average scale factor, all avoiding the
singularity and reaching similar asymptotic states, deemed
semi-classical.

lundi 6 avril 2020 - 11:00
Webinaire,
Institut d'Astrophysique de Paris

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