Quantum-limited microwave parametric amplifiers are genuine key pillars for rising quantum
technologies and, in general, for applications that rely on the successful readout of weak …

Degenerate parametric amplifiers (DPAs) exhibit the unique property of phase-sensitive
gain and can be used to noiselessly amplify small signals or squeeze field fluctuations …

The field of propagating quantum microwaves is a relatively new area of research that is
receiving increased attention due to its promising technological applications, both in …

Entangled microwave photons form a fundamental resource for quantum information
processing and sensing with continuous variables. We use a low-loss Josephson …

Flux-biased loops including one or more Josephson junctions are ubiquitous elements in
quantum information experiments based on superconducting circuits. These quantum …

Predicting the performance of traveling-wave parametric amplifiers (TWPAs) based on
nonlinear elements like superconducting Josephson junctions (JJs) is vital for qubit read-out …

Most microwave readout architectures in quantum computing or sensing rely on a
semiconductor amplifier at 4 K, typically a high-electron mobility transistor (HEMT). Despite …

Simultaneous ideal quantum measurements of multiple single-photon-level signals would
advance applications in quantum information processing, metrology, and astronomy but …

Josephson parametric amplifiers are an important part of a modern superconducting
quantum computing platform and squeezed quantum states generation devices. Traveling …

We report on the implementation of a near-quantum-limited, traveling-wave parametric
amplifier that uses three-wave mixing (3WM). To favor amplification by 3WM, we use …