Topological Protection of Path Entanglement in Photonic Quantum Walks
Mikael C. Rechtsman, Yaakov Lumer, Yonatan Plotnik, Armando Pérez-Leija, Alexander Szameit, Mordechai Segev · 2015
We show that entangled photons propagating along the edge of a photonic topological insulator preserve their entanglement despite edge defects of any kind. This represents a novel methodology for the transport of quantum information.