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 unique features of quantum theory offer a powerful new paradigm for information
processing. Translating these mathematical abstractions into useful algorithms and …

We study the energy relaxation times (T 1) of superconducting transmon qubits in 3D
cavities as a function of dielectric participation ratios of material surfaces. This surface …

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

We present microwave-frequency NbTiN resonators on silicon, systematically achieving
internal quality factors above 1 M in the quantum regime. We use two techniques to reduce …

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) …

We demonstrate enhanced relaxation and dephasing times of transmon qubits, up to∼ 60 μ
s⁠, by fabricating the interdigitated shunting capacitors using titanium nitride (TiN) …

Superconducting thin films with high intrinsic kinetic inductance are of great importance for
photon detectors, achieving strong coupling in hybrid systems, and protected qubits. We …

Enabling applications for solid state quantum technology will require systematically reducing
noise, particularly dissipation, in these systems. Yet, when multiple decay channels are …