Understanding Topological Insulators
The SSH Model
The simplest one-dimensional topological insulator.
Introduced 1979
SSH Hamiltonian
H = Σₙ [ v |A,n⟩⟨B,n| + w |A,n+1⟩⟨B,n| ] + h.c.
PHASE I: THE DIMERIZED LATTICE
The SSH model describes a topological chain with alternating bond
strengths.