Abstract (eng)
The classical reduction of asymptotically AdS3 general relativity to an SL(2) Wess--Zumino--Witten model, further to Liouville conformal field theory, is phrased as correspondence of phase spaces. We demonstrate the equivalence of dynamics and physical observables between these theories. Starting from the coframe formulation, a linear field redefinition is performed to rephrase the problem at hand in the language of SL(2) Chern--Simons gauge field theory. Translating the asymptotically AdS3 boundary conditions into this language results in two pairs of boundary conditions for the Chern--Simons fields. The first pair allows for reduction to the SL(2) Wess--Zumino--Witten model, the second pair allows for reduction to Liouville conformal field theory.This analysis is extended to the higher-spin generalization of asymptotically AdS3 gravity. Starting from an SL(N) Chern--Simons setting, performing the same steps as before, yields first the SL(N) Wess--Zumino--Witten model, then the SL(N) Toda conformal field theory. Explicit calculations are performed for the N=3 case.