Squeezed states of light have been used extensively to increase the precision of
measurements, from the detection of gravitational waves to the search for dark matter. In the …

When strongly pumped at twice their resonant frequency, nonlinear resonators develop a
high-amplitude intracavity field, a phenomenon known as parametric self-oscillations. The …

We build a parametric amplifier with a Josephson field-effect transistor (JoFET) as the active
element. The resonant frequency of the device is field-effect tunable over a range of 2 GHz …

The use of superconducting microresonators together with quantum-limited Josephson
parametric amplifiers has enhanced the sensitivity of pulsed electron spin resonance (ESR) …

Superconducting parametric amplifiers play a crucial role in the preparation and readout of
quantum states at microwave frequencies, enabling high-fidelity measurements of …

Josephson microwave circuits are essential for the currently flourishing research on
superconducting technologies, such as quantum computation, quantum sensing, and …

Nonlinear microwave circuits are key elements for many groundbreaking research directions
and technologies, such as quantum computation and quantum sensing. The majority of …

Quantum computing requires a novel approach to store data as quantum states, opposite to
classical bits. One of the most promising candidates is entangled photons. In this …

A quantum-limited amplifier enables the amplification of weak signals while introducing
minimal noise dictated by the principles of quantum mechanics. These amplifiers serve a …

We investigate the effect of magnetic field on a photonic-crystal Josephson traveling-wave
parametric amplifier (TWPA). We show that the observed change in photonic bandgap and …