Conformal Invariance & SLE Curves
Schramm-Loewner Evolution traces cluster boundaries at 2D critical points
Schramm-Loewner Evolution (SLE_κ): the unique conformally invariant random curve family,
discovered by Oded Schramm (1999). Parametrized by κ: κ≤4 gives simple curves, 4<κ<8 self-intersecting,
κ≥8 space-filling. Critical models map to SLE: percolation hulls → SLE_6
(Smirnov 2001), Ising interfaces → SLE_3, SAW → SLE_{8/3},
uniform spanning tree → SLE_2. The fractal dimension is d_f = 1 + κ/8.