Floquet‐Engineered System‐Reservoir Interaction in the Transverse Field Ising Model

Periodically driving a quantum many‐body system can drastically change its properties, leading to exotic non‐equilibrium states of matter without a static analog. In this scenario, parametric resonances and the complexity of an interacting many‐body system are pivotal in establishing non‐equilibrium states. A Floquet‐engineered transverse field Ising model for the controlled propagation in one dimension of spin waves is reported. The underlying mechanisms behind the proposal rely on high‐frequency drivings using characteristic parametric resonances of the spin lattice. Many‐body resonances modulating spin‐spin exchange or individual spin gaps inhibit interactions between spins thus proving a mechanism for controlling spin‐wave propagation and a quantum switch. The schemes may be implemented in circuit QED with direct applications in coupling–decoupling schemes for system‐reservoir interaction and routing in quantum networks.