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A Floquet systems is a periodically driven quantum system. It can bedescribed by a Floquet operator. If this unitary operator has a gap in thespectrum, then one can define associated topological bulk invariants which caneither only depend on the bands of the Floquet operator or also on the time asa variable. It is shown how a K-theoretic result combined with thebulk-boundary correspondence leads to edge invariants for the half-spaceFloquet operators. These results also apply to topological quantum walks.

Topological boundary invariants for Floquet systems and quantum walks