Description
I will discuss a metric deformation of the Poisson Sigma Model as a controlled departure from its purely topological and conservative dynamics. Focusing on the SL(2,R) formulation of Jackiw–Teitelboim gravity, I will argue that such a deformation may provide an effective description of non-conservative, coarse-grained, or quantum-gravitational corrections to near-AdS2 dynamics. In particular, the model suggests a possible way to interpolate between ideal near-extremal horizon boundary dynamics and more dissipative, Schwarzschild-like regimes.