Speaker
Prof.
Ignatios Antoniadis
(LPTHE, Paris)
Description
I will discuss the swampland distance conjecture and the Dark Dimension proposal for the cosmological constant. I will then argue on the possibility that the dark dimension obtains large size by higher dimensional inflation, relating the weakness of the actual gravitational force to the size of the observable universe. I will show that the power spectrum of primordial density fluctuations from 5-dimensional inflation is consistent with present observations with deviations that can be tested in future observations, together with the shape of the bispectrum which differs from standard 4-dimensional single field inflation.
