IAS Quantum Aspects of Black Holes Group Meeting

Abstract: I will describe a framework for computing late-time correlators in de Sitter spacetime by Wick rotation from the Euclidean sphere. I will then discuss two applications. First, the framework lets us verify explicitly that the "in-in=Euclidean" equivalence for some tree and loop diagrams. Second, when we carry out a Landau analysis in this framework, the known singularities of cosmological correlators come out as solutions of the corresponding Landau equations.