π ≈ ?

samples: 0 | error: —

LATTICE RANDOM FIELD (Z₂ Ising-like)

Lattice field: each site σ∈{±1}, updated by Metropolis algorithm.
β = inverse temperature. β→∞: ordered (ferromagnet). β→0: random.
Correlation length ξ diverges at critical β_c ≈ 0.44 (2D Ising).