Over the last two decades, tremendous advances have been made for constructing large-
scale quantum computers. In particular, quantum computing platforms based on …

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

Quantum communication relies on the efficient generation of entanglement between remote
quantum nodes, as entanglement is required to achieve and verify secure communications …

Gottesman, Kitaev, and Preskill have formulated a way of encoding a qubit into an oscillator
such that the qubit is protected against small shifts (translations) in phase space. The idea …

We study a recently demonstrated design for a high-performance tunable coupler suitable
for superconducting Xmon and planar transmon qubits [Y. Chen, Phys. Rev. Lett. 113 …

Solid-state Majorana fermions are generating intensive interest because of their unique
properties and possible applications in fault tolerant quantum memory devices. Here we …

Flux-tunable qubits are a useful resource for superconducting quantum processors. They
can be used to perform cphase gates, facilitate fast reset protocols, avoid qubit-frequency …

We present the “trimon,” a multimode superconducting circuit implementing three qubits with
all-to-all longitudinal coupling. This always-on interaction enables simple implementation of …

We realize a device allowing for tunable and switchable coupling between two frequency-
degenerate superconducting resonators mediated by an artificial atom. For the latter, we …

The engineering of quantum devices has reached the stage where we now have small-scale
quantum processors containing multiple interacting qubits within them. Simple quantum …