by
Jakub Mielczarek(Jagiellonian University, Cracow)
→
Europe/Stockholm
122:026
122:026
Description
At the seminar I will present some recent advances in exploring
physics of the Planck epoch obtained within loop quantum cosmology.
I will begin by discussing the issue of singularity resolution in
homogeneous models, possibility of generating inflation and
observational tests. Subsequently I will focus on the analysis
of inhomogeneities. As we will show, perturbative inhomogeneities
in loop quantum cosmology generate metric signature change
with an intermediate state of asymptotic silence. We propose
a model of spontaneous symmetry breaking which may explain
microscopic nature of these phenomena. The effects of signature
change and asymptotic silence are related with defamation of the
Dirac algebra of constraints. Based on this, we study consequences
on deformation of the Poincare algebra. New possible relations
between approaches to quantum gravity emerge from these
investigations.
