Publisher Correction: A square-root topological insulator with non-quantized indices realized with photonic Aharonov-Bohm cages.

Kremer, Mark; Petrides, Ioannis; Meyer, Eric; Heinrich, Matthias; Zilberberg, Oded; Szameit, Alexander · Nat Commun · 2020

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An amendment to this paper has been published and can be accessed via a link at the top of the paper.