Radio-frequency communication systems have long used bulk-and surface-acoustic-wave
devices supporting ultrasonic mechanical waves to manipulate and sense signals. These …

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 …

Optical nonreciprocity is an essential property for a wide range of applications, such as
building nonreciprocal optical devices that include isolators and circulators. The realization …

We demonstrate a 3-port Josephson parametric circulator matched to 50 Ω using second
order Chebyshev networks. The device notably operates with two of its signal ports at the …

The fragile nature of quantum circuits is a major bottleneck to scalable quantum
applications. Operating at cryogenic temperatures, quantum circuits are highly vulnerable to …

With the development of quantum technologies and their broad applications, the
phenomenon of reciprocity breaking has been evolving from an effective tool in classical …

Nonreciprocal microwave devices play critical roles in high-fidelity, quantum-nondemolition
(QND) measurement schemes. They impose unidirectional routing of readout signals and …

The cryogenic hardware required to build a superconducting-qubit-based quantum
computer demands a variety of microwave components. These elements include microwave …

A crucial limit to measurement efficiencies of superconducting circuits comes from losses
involved when coupling to an external quantum amplifier. Here, we realize a device …

We present a design for a superconducting, on-chip circulator composed of dynamically
modulated transfer switches and delays. Design goals are set for the multiplexed readout of …