Seminario Teorico: Eran Palti

12 November, 2018 - 11:30 - 12:30
Aula Grassano

Dr. Eran Palti (Max-Planck-Institute for Physics - Munich)

Title: Distance and de Sitter Conjectures on the Swampland


The string theory Swampland programme aims at distinguishing quantum field theories which can be completed into quantum gravity in the ultraviolet from those which cannot. I will outline relations between different conjectural properties of the Swampland, showing how a coherent picture is emerging, and discuss a proposal for the microscopic physics underlying them. I will focus in particular on the Swampland Distance Conjecture which is concerned with large variations of scalar field expectation values. I will then discuss a proposed connection between this conjecture and the Swampland de Sitter conjecture. The latter gives a lower bound on the gradient of positive potentials, in particular implying that there are no (meta-)stable de Sitter vacua in string theory.