Amorphous solids show surprisingly universal behaviour at low temperatures. The
prevailing wisdom is that this can be explained by the existence of two-state defects within …

The performance of superconducting circuits for quantum computing is limited by materials
losses. In particular, coherence times are typically bounded by two-level system (TLS) …

Quantum algorithms offer a dramatic speedup for computational problems in material
science and chemistry. However, any near-term realizations of these algorithms will need to …

Superconducting qubits are an attractive platform for quantum computing since they have
demonstrated high-fidelity quantum gates and extensibility to modest system sizes …

Superconducting qubits are electronic circuits comprising lithographically defined
Josephson tunnel junctions, inductors, capacitors, and interconnects. When cooled to …

We demonstrate that a high kinetic inductance disordered-superconductor nanowire can
realize a circuit element–known as a superinductor–with a characteristic impedance greater …

High quality factor, ie low loss, microwave resonators are important for quantum information
storage and addressing. In this work we study the resonance frequency and loss in …

Thin films of TiN were sputter-deposited onto Si and sapphire wafers with and without SiN
buffer layers. The films were fabricated into rf coplanar waveguide resonators, and internal …

We demonstrate aluminum-on-silicon planar transmon qubits with time-averaged T 1 energy
relaxation times of up to 270 μs, corresponding to Q= 5 million, and a highest observed …

Nanomechanical oscillators offer numerous advantages for quantum technologies. Their
integration with superconducting qubits shows promise for hardware-efficient quantum error …