Speaker
Ignatios Antoniadis
(LPTHE - CNRS, Sorbonne University and AEC University of Bern)
Description
I will present a supergravity action whose bosonic part contains the f(R) gravity. In a perturbative expansion in powers of $R$, one obtains a small deformation of the Starobinsky cosmological model that solves the problem of initial conditions within the validity of the effective field theory, below the scale of tower of states predicted by the swampland distance conjecture. Moreover, it allows better agreement with the recent cosmological data. A particular example of an underlying microscopic theory with such properties is provided by a four-dimensional heterotic string model containing the Standard Model of particle physics.
Author
Ignatios Antoniadis
(LPTHE - CNRS, Sorbonne University and AEC University of Bern)