Ergodic and Entropic Behavior of the Harmonic Map Heat Flow to the Moduli Space of Flat Tori
This paper establishes that the harmonic map heat flow from a compact Riemannian manifold into the moduli space of unit-area flat tori is stable, ergodic, and converges to the normalized hyperbolic measure, with the relative entropy decaying to zero to quantify this information-theoretic equilibrium.