Jackiw–Teitelboim gravity

In theoretical physics, Jackiw–Teitelboim gravity, also known as JT gravity or the R=T model, is a theory of gravity with a dilaton in one spatial and one time dimension (1+1D). It was first formulated by Roman Jackiw and Claudio Teitelboim. The theory is notable for being a toy model of quantum gravity that is exactly solvable, and it has found applications in understanding near-extremal black holes and the AdS/CFT correspondence.

The dynamics of JT gravity in the bulk are relatively simple, leading to a constant negative curvature spacetime (Anti-de Sitter space). However, the theory possesses interesting dynamics on the boundary of this spacetime, which are described by the Schwarzian theory.This boundary theory captures the low-energy behavior of the Sachdev-Ye-Kitaev (SYK) model, a model of quantum chaos.

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