Parametric Effects and Non-Reciprocal Phenomena in Engineered Quantum Systems

Preserving the quantum coherence of signals is of paramount importance for components utilized in quantum information processing. In recent years tremendous progress has been made in the development of quantum-limited components, such as amplifiers and isolators. A promising way to design these devices is based on parametric modulation of coupled modes by utilizing Josephson junction-based tunable couplers. In this talk we present an introduction of the basic concept on how to engineer non-reciprocal parametric interactions and we discuss routes for optimizing the design of microwave circuits enabling non-reciprocal and reciprocal amplification at the quantum level.