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

Superconducting qubits provide a promising path toward building large-scale quantum
computers. The simple and robust transmon qubit has been the leading platform, achieving …

Artificial atoms realized by superconducting circuits offer unique opportunities to store and
process quantum information with high fidelity. Among them, implementations of circuits that …

Aharonov-Bohm (AB) caging, a special flat-band localization mechanism, has spurred great
interest in different areas of physics. AB caging can be harnessed to explore the rich 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 …

Superconducting quantum information processing machines are predominantly based on
microwave circuits with relatively low characteristic impedance, about 100 Ω, and small …

A striking characteristic of superconducting circuits is that their eigenspectra and intermode
coupling strengths are well predicted by simple Hamiltonians representing combinations of …

We characterize a fluxonium qubit consisting of a Josephson junction inductively shunted
with a NbTiN nanowire superinductance. We explain the measured energy spectrum by …

We develop and characterize a symmetry-protected superconducting qubit that offers
simultaneous exponential suppression of energy decay from charge and flux noises, and …

We present a protected superconducting qubit based on an effective circuit element that only
allows pairs of Cooper pairs to tunnel. These dynamics give rise to a nearly degenerate …