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 technological world is in the midst of a quantum computing and quantum information
revolution. Since Richard Feynman's famous 'plenty of room at the bottom'lecture (Feynman …

The aim of this review is to provide quantum engineers with an introductory guide to the
central concepts and challenges in the rapidly accelerating field of superconducting …

The performance of superconducting quantum circuits for quantum computing has advanced
tremendously in recent decades; however, a comprehensive understanding of relaxation …

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

We demonstrate a planar, tunable superconducting qubit with energy relaxation times up to
44 μ s. This is achieved by using a geometry designed to both minimize radiative loss and …

Significant advances in coherence render superconducting quantum circuits a viable
platform for fault-tolerant quantum computing. To further extend capabilities, highly coherent …

Hybrid quantum systems in which acoustic resonators couple to superconducting qubits are
promising quantum information platforms. High quality factors and small mode volumes …

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 …

We have integrated single and coupled superconducting transmon qubits into flip-chip
modules. Each module consists of two chips—one quantum chip and one control chip—that …