|DATE||August 14 (Wed), 2019|
|INSTITUTE||San Francisco State University|
|TITLE||Lecture 3: Jackiw-Teitelboim gravity on two-dimensional nearly de Sitter spacetime|
Jackiw-Teitelboim gravity is a simple toy model of two-dimensional gravity that describes the low-energy gravitational dynamics of many near-extremal black holes in string theory. The field content of the model is a metric and a scalar field called a dilaton, and with negative cosmological constant its basic solutions are anti de Sitter (AdS) spacetimes where the dilaton grows near its asymptotic boundary. These solutions are called “nearly AdS2” spacetimes, and the gravitational dynamics on them reduces to a model of boundary dynamics sometimes called the “Schwarzian theory.” One reason for the recent attention to this model and to the Schwarzian theory more generally is that the same Schwarzian theory arises as the low-energy effective description of the Sachdev-Ye-Kitaev model.