Non-ordering conjecture for fuzzy Potts measures on the lattice

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Let q≥3q\geq 3, r∈1,…,q−1r\in \\{1,\dots,q-1\\}, and consider the fuzzy Potts model on Zd\mathbb{Z}^d. For J>0J>0, write νq,J,rZd,+\nu_{q,J,r}^{\mathbb{Z}^d,+} for its plus-state fuzzy Potts measure, and let stochastic ordering be the usual ordering of probability measures on configurations. Non-ordering conjecture. If J1,J2>0J_1,J_2>0 with J1≠J2J_1\neq J_2, then νq,J1,rZd,+\nu_{q,J_1,r}^{\mathbb{Z}^d,+} and νq,J2,rZd,+\nu_{q,J_2,r}^{\mathbb{Z}^d,+} are not stochastically ordered. This conjecture concerns the failure of monotonicity in the interaction parameter; the corresponding statement for the Ising model is proved, while the fuzzy Potts case is presented as open.

References

Primary source

Marcus Warfheimer, “Stochastic domination for the Ising and fuzzy Potts models”, arXiv:1003.3722 (2010).

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