Controlling the direction of topological transport in a non-Hermitian time-reversal symmetric Floquet ladder
Bastian Höckendorf,
Andreas Alvermann,
Holger Fehske
Abstract:We propose a one-dimensional Floquet ladder that possesses two distinct topological transport channels with opposite directionality. The transport channels occur due to a Z 2 non-Hermitian Floquet topological phase that is protected by time-reversal symmetry. The signatures of this phase are two pairs of Kramers degenerate Floquet quasienergy bands that are separated by an imaginary gap. We discuss how the Floquet ladder can be implemented in a photonic waveguide lattice and show that the direction of transpor… Show more
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