Universal flow equations and chaos bound saturation in 2d dilaton gravity

A bstract We show that several features of the Jackiw-Teitelboim model are in fact universal properties two-dimensional Maxwell-dilaton gravity theories with a broad class asymptotics. These satisfy flow equation structure dimensionally reduced $$ T\overline{T} T ¯ deformation, and exhibit chaotic behavior signaled by maximal Lyapunov exponent. One consequence our results is no-go theorem for smooth flows from an asymptotically AdS 2 region to de Sitter fixed point.