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Topological Quantum Walks — Chiral Edge States
A QWZ (Qi-Wu-Zhang) Chern insulator on a 2D lattice. Sweep the mass parameter M and the Chern number C jumps between 0, −1 and +1. Whenever C ≠ 0, the sample's edge carries one-way, defect-immune states — the bulk-boundary correspondence behind topological insulators and the quantum Hall effect.
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