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 …

In the past 20 years, impressive progress has been made both experimentally and
theoretically in superconducting quantum circuits, which provide a platform for manipulating …

The scalable application of quantum information science will stand on reproducible and
controllable high-coherence quantum bits (qubits). Here, we revisit the design and …

We report superconducting fluxonium qubits with coherence times largely limited by energy
relaxation and reproducibly satisfying T 2> 100 μ s (T 2> 400 μ s in one device). Moreover …

Nonequilibrium quasiparticle excitations degrade the performance of a variety of
superconducting circuits. Understanding the energy distribution of these quasiparticles will …

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 …

The heavy-fluxonium circuit is a promising building block for superconducting quantum
processors due to its long relaxation and dephasing time at the flux-frustration point …

Transforming stand-alone qubits into a functional, general-purpose quantum processing unit
requires an architecture where many-body quantum entanglement can be generated and …

Quantum computing offers a powerful new paradigm of information processing that has the
potential to transform a wide range of industries. In the pursuit of the tantalizing promises of …

Coherent control of quantum states has been demonstrated in a variety of superconducting
devices. In all of these devices, the variables that are manipulated are collective …