Place: Chamberlin 5280 (Zoom link also available for online participants who signed up on our mailing list)
Speaker: Daniel Junghans, Institute for Theoretical Physics, TU Wien
Abstract: The simplest explanation for the observed accelerating expansion of our universe is that we live in an approximate de Sitter space. On the other hand, there is growing evidence that various popular proposals for realizing de Sitter space in string theory do not self-consistently control neglected string corrections. In this talk, we show such a control problem in two rather different proposals: the large-volume scenario and the supercritical scenario.