Uniqueness of the Gibbs measure for the anti-ferromagnetic Potts model on the infinite $Δ$-regular tree for large $Δ$

Abstract: In this paper we prove that for any integer $q\geq 5$, the anti-ferromagnetic $q$-state Potts model on the infinite $\Delta$-regular tree has a unique Gibbs measure for all edge interaction parameters $w\in [1-q/\Delta,1)$, provided $\Delta$ is large enough. This confirms a longstanding folklore conjecture.