We describe the first implementation of a Josephson Traveling Wave Parametric Amplifier
(JTWPA) in an axion dark matter search. The operation of the JTWPA for a period of about …

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

Photonic integrated circuits (PICs) are expected to play a significant role in the ongoing
second quantum revolution, thanks to their stability and scalability. Still, major upgrades are …

We present a quantum-mechanical model for a four-wave-mixing Josephson traveling-wave
parametric amplifier including substrate losses and associated thermal fluctuations. Under …

The scaling up of quantum computers operating in the microwave domain requires
advanced control electronics, and the use of integrated components that operate at the …

Systematic errors in qubit state preparation arise due to non-idealities in qubit control lines
such as impedance mismatch. Using a data-based methodology of short-open-load …

Superconducting quantum computing is at the forefront of demonstrating quantum
advantages for revolutionary applications in science and technology. One key component …

Background: Kinetic Inductance Travelling Wave Parametric Amplifiers (KITWPAs) are a
variant of superconducting amplifier that can potentially achieve high gain with quantum …

Qubit-specific measurement in a superconducting quantum processor requires physical
interconnects that traverse 4 orders of magnitude in temperature from 293 K to 10 mK …

Parametric amplifiers have become a workhorse in superconducting quantum computing;
however, research and development of these devices has been hampered by inconsistent …