Majority Vote Model

2D lattice spin dynamics — 2D Ising universality class, qc ≈ 0.075
Each spin σᵢ = ±1 flips to the local majority of 4 neighbors with probability (1−q), and to the minority with probability q. Phase transition at qc ≈ 0.075 (2D Ising class). Magnetization |m| = |⟨σ⟩| → 0 for q > qc.