Interacting topological frequency converter

Abstract

This work describes how interaction impact the topological properties of a quantum system with dynamically-induced synthetic dimensions. The authors study a minimal model of two interacting spins exposed to two incommensurate periodic drives. Their results show that the associated frequency conversion between the two fields occurs at topologically quantized rates that are forbidden in the non-interacting limit. Specifically, interaction enables an amplification of the dynamical topological effect