We present a new theoretical framework to analyze microwave amplifiers based on the dc SQUID. Our analysis applies input-output theory generalized for Josephson junction devices biased in the running state. Using this approach, we express the high-frequency dynamics of the SQUID as a scattering between the participatingmodes. This enables us to elucidate the inherently nonreciprocal nature of g...

We describe recent progress in integrated microwave photonics in wideband signal processing applications with a focus on the key signal processing building blocks, the realization of monolithic integration, and cascaded photonic signal processing for analog radio frequency (RF) photonic links. New developments in integration-based microwave photonic techniques, that have high potentialities to ...

Abstract We use material-distribution-based topology optimization to design a three-port frequency dividing multiplexer at microwave frequencies. That is, by placing good electric conductor inside the domain, we aim passive device that splits incoming signal’s frequencies into two bands and transmits them their respective output ports. The Helmholtz equation models time-harmonic wave propagatio...

Scalable quantum information processing requires that modular gate operations can be executed in parallel. The presence of crosstalk decreases the individual addressability, causing erroneous results during simultaneous operations. For superconducting qubits which operate microwave regime, electromagnetic isolation is often limited due to design constraints, leading signal deteriorate quality H...