Speaker
Description
Open quantum systems provide the natural setting for describing fluctuations, dissipation, and non-equilibrium dynamics. While these phenomena are well understood for weakly coupled baths, strongly coupled baths remain difficult to treat using conventional methods. In this talk, I will discuss how recent developments in real-time holography (a real-time formulation of the AdS/CFT correspondence) provide a new approach to this problem. After briefly introducing the Schwinger-Keldysh ("in-in") formalism and its holographic counterpart, I will explain how holography enables the derivation of open EFTs for systems coupled to strongly interacting baths. In particular, I will show how black holes encode dissipation and fluctuations, leading naturally to local open EFTs. Finally, building on this picture, I will discuss how black hole dynamics provide a holographic derivation of the fluctuation-dissipation relations.