Unitary Energy Transfer Between Coupled Cavities Using Temporal Switching

Tailored time variations can enable efficient control over signal flows, giving rise to exotic wave phenomena. In this work, we demonstrate how abrupt temporal switching of the coupling between two cavities can tailor the energy flow between them beyond the limitations of static scenarios, enabling unitary energy transfer. The proposed scheme is robust with respect to a wide range of non-idealities, with implications for classical and quantum phenomena, from computing to nanophotonic systems.