Toric non-archimedean $\mu$-entropy and thermodynamical structure

We study non-archimedean $\mu$-entropy for toric variety as a further exploration of $\mu$K-stability. We show the existence of optimizer of toric non-archimedean $\mu^\lambda$-entropy for $\lambda \in \mathbb{R}$ and the uniqueness for $\lambda \le 0$. For the proof of existence, we establish a Rellich type compactness result for convex functions on simple polytope. We also reveal a thermodynamical structure on toric non-archimedean $\mu$-entropy. This observation allows us to interpret the enigmatic parameter $T = - \frac{\lambda}{2\pi}$ as temperature and non-archimedean $\mu$-entropy as entropy of an infinite dimensional composite system.