Nonadiabatic Topological Energy Pumps with Quasiperiodic Driving.

Abstract

We derive a topological classification of the steady states of d-dimensional lattice models driven by D incommensurate tones. Mapping to a unifying (d+D)-dimensional localized model in frequency space reveals anomalous localized topological phases (ALTPs) with no static analog. While the formal classification is determined by d+D, the observable signatures of each ALTP depend on the spatial dimension d. For each d, with d+D=3, we identify a quantized circulating current and corresponding topological edge states. The edge states for a driven wire (d=1) function as a quantized, nonadiabatic energy pump between the drives. We design concrete models of quasiperiodically driven qubits and wires that achieve ALTPs of several topological classes. Our results provide a route to experimentally access higher dimensional ALTPs in driven low-dimensional systems.