Chiral flow in one-dimensional Floquet topological insulators

  title={Chiral flow in one-dimensional Floquet topological insulators},
  author={Xu Liu and Fenner Harper and Rahul Roy},
  journal={Physical Review B},
We propose a bulk topological invariant for one-dimensional Floquet systems with chiral symmetry which quantifies the particle transport on each sublattice during the evolution. This chiral flow is physically motivated, locally computable, and improves on existing topological invariants by being applicable to systems with disorder. We derive a bulk-edge correspondence which relates the chiral flow to the number of protected dynamical edge modes present on a boundary at the end of the evolution… Expand

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