SSH Model — Topological Edge States

SSH Topological Model

Intracell hopping t₁ 0.3

Intercell hopping t₂ 1.0

Chain length N 20

On-site disorder Δ 0.0

ν = ?

Phase: —

Su-Schrieffer-Heeger (SSH) Model
1D lattice with alternating hoppings t₁ (intracell) and t₂ (intercell). Winding number ν = 1 when t₁ < t₂ (topological phase), hosting zero-energy edge states. ν = 0 when t₁ > t₂ (trivial). Bulk-boundary correspondence is exact.