Hysteretic Flux Response and Nondegenerate Gain of Flux-Driven Josephson Parametric Amplifiers
Hysteretic Flux Response and Nondegenerate Gain of Flux-Driven Josephson Parametric Amplifiers
Josephson parametric amplifiers (JPA) have become key devices in quantum science and technology with superconducting circuits. In particular, they can be utilized as quantum-limited amplifiers or as a source of squeezed microwave fields. Here, we report on the detailed measurements of five flux-driven JPAs, three of them exhibiting a hysteretic …