Jackiw–Teitelboim gravity, also known as the R = T model[1] , or simply JT gravity (after physicists Roman Jackiw and Claudio Teitelboim), is a theory of gravity with dilaton coupling in one spatial and one time dimension.
It should not be confused[2][3] with the CGHS model or Liouville gravity.
The action is given by The metric in this case is more amenable to analytical solutions than the general 3+1D case though a canonical reduction for the latter has recently been obtained.
[4] For example, in 1+1D, the metric for the case of two mutually interacting bodies can be solved exactly in terms of the Lambert W function, even with an additional electromagnetic field.
on shell, which means the metric is either Anti-de Sitter space or De Sitter space depending upon the sign of Λ. Dilaton § The dilaton in quantum gravity