BACKGROUND The past two decades have seen intense efforts aimed at building quantum
computing hardware with the potential to solve problems that are intractable on classical …

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 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 …

Over the past several decades, quantum information science has emerged to seek answers
to the question: can we gain some advantage by storing, transmitting and processing …

The efficiency of the future devices for quantum information processing is limited mostly by
the finite decoherence rates of the individual qubits and quantum gates. Recently …

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

The magnetic sensing at nanoscale level is a promising and interesting research topic of
nanoscience. Indeed, magnetic imaging is a powerful tool for probing biological, chemical …

We study the impact of low-frequency magnetic flux noise upon superconducting transmon
qubits with various levels of tunability. We find that qubits with weaker tunability exhibit …

We calculate the energy decay rate of Josephson qubits and superconducting resonators
from nonequilibrium quasiparticles. The decay rates from experiments are shown to be …

Magnetic flux noise is a dominant source of dephasing and energy relaxation in
superconducting qubits. The noise power spectral density varies with frequency as 1/f α, with …