Advances in materials science and engineering have played a central role in the
development of classical computers and will undoubtedly be critical in propelling the …

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) …

The progress witnessed within the field of quantum computing has been enabled by the
identification and understanding of interactions between the state of the quantum bit (qubit) …

Solid-state qubits with transition frequencies in the microwave regime, such as
superconducting qubits, are at the forefront of quantum information processing. However …

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 …

We acquire tantalum thin film in its α phase (α-Ta) using direct-current magnetron sputtering.
According to x-ray diffraction results, 110-Ta is dominant. Quarter-wavelength coplanar …

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 …

We examine the DC and radio frequency (RF) response of superconducting transmission
line resonators comprised of very thin NbTiN films,< 12 nm in thickness, in the high …

We have studied superconducting coplanar-waveguide (CPW) resonators fabricated from
disordered films of aluminum. The very high kinetic inductance of these films, inherent to …