Topological invariants for Floquet-Bloch systems with chiral, time-reversal, or particle-hole symmetry

Bastian Höckendorf, Andreas Alvermann, Holger Fehske

We introduce ${\mathbb{Z}}_2$-valued bulk invariants for symmetry-protected topological phases in $2+1$ dimensional driven quantum systems. These invariants adapt the $W_3$-invariant,…