Speakers
Yoshiyuki WatabikiProf.
Jan Ambjorn
(Niels Bohr Institute & Radboud University)
Description
We describe how the original 2d CDT model has been generalized in various ways: to a multicomponent W3 algebra model based on the exceptional Jordan algebra and to a four-dimensional CDT model. Remarkably, under certain assumptions, both these generalisations lead to the same modified Friedmann equation where the present expansion of our universe is driven not by the cosmological constant, but by the creation of baby universes. We will discuss how the model seems to resolve the tension between the Hubble constant determined from early time observations (the CMB data) and from present days local direct measurements.
Primary authors
Yoshiyuki Watabiki
Prof.
Jan Ambjorn
(Niels Bohr Institute & Radboud University)
