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Symmetry-protected entangling boundary zero modes in crystalline topological insulators
Crystalline topological insulators owe their topological character to the protection that certain boundary states acquire because of certain point-group symmetries.We first show that a Hermitian operator obeying supersymmetric quantum mechanisms (SUSY QM) delivers the entanglement spectrum.We then show that such an entanglement spectrum that is compatible with a certain point-group …