🌀 RG FLOW — 2D ISING
Initial coupling K=J/kT:
0.44
Initial field h:
0.0
RG steps:
10
Run RG Flow
Scan Phase Diagram
Kc ≈ 0.4407 (exact 2D Ising)
K<Kc → disorder (K→0)
K>Kc → order (K→∞)
Real-space RG: majority rule block spin decimation. Fixed point at Kc = ln(1+√2)/2 ≈ 0.4407. Wilson (1971): RG fixed points classify universality classes.