The innate complexity of solid-state physics exposes superconducting quantum circuits to
interactions with uncontrolled degrees of freedom degrading their coherence. By …

Mesoscopic Josephson junctions, consisting of overlap** superconducting electrodes
separated by a nanometre-thin oxide layer, provide a precious source of nonlinearity for …

Superconducting parametric amplifiers are crucial components in microwave quantum
circuits for enabling quantum-limited signal readout. The best-performing such amplifiers are …

Resonator measurements are a simple but powerful tool to characterize a material's
microwave response. The losses of a resonant mode are quantified by its internal quality …

Josephson junction parametric amplifiers have become essential tools for microwave
quantum circuit readout with minimal added noise. Even after improving at an impressive …

The microscopic description of 1/f magnetic flux noise in superconducting circuits has
remained an open question for several decades despite extensive experimental and …

The high kinetic inductance offered by granular aluminum (grAl) has recently been
employed for linear inductors in superconducting high-impedance qubits and kinetic …

We characterize niobium nitride (NbN) λ/2 coplanar waveguide resonators, which were
fabricated from a 10-nm-thick film on silicon dioxide grown by sputter deposition. For films …

Magnetic-field-resilient superconducting circuits enable sensing applications and hybrid
quantum computing architectures involving spin or topological qubits and electromechanical …

High-impedance resonators are a promising contender for realizing long-distance
entangling gates between spin qubits. Often, the fabrication of spin qubits relies on the use …