Integrable 1+1 Dimensional Gravity Models

Abstract

Integrable models of dilaton gravity coupled to electromagnetic and scalar matter fields in dimensions 1+1 and 0+1 are reviewed. The 1+1 dimensional integrable models are either solved in terms of explicit quadratures or reduced to the classically integrable Liouville equation. The 0+1 dimensional integrable models emerge as sectors in generally non integrable 1+1 dimensional models and can be solved in terms of explicit quadratures. The Hamiltonian formulation and the problem of quantizing are briefly discussed. Applications to gravity in any space-time dimension are outlined and a generalization of the so called 'no-hair' theorem is proven using local properties of the Lagrange equations for a rather general 1+1 dimensional dilation gravity coupled to matter.