Quantum-mechanical effects at the macroscopic level were first explored in Josephson-
junction-based superconducting circuits in the 1980s. In recent decades, the emergence of …

Transmon qubits are ubiquitously used in superconducting quantum information processor
architectures. Strong drives are required to realize fast, high-fidelity, gates 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 …

Qubit measurement and control in circuit quantum electrodynamics (QED) rely on
microwave drives, with higher drive amplitudes ideally leading to faster processes. However …

By applying a microwave drive to a specially designed Josephson circuit, we have realized
a double-well model system: a Kerr oscillator submitted to a squeezing force. We have …

Superconducting microwave circuits incorporating nonlinear devices, such as Josephson
junctions, are a leading platform for emerging quantum technologies. Increasing circuit …

We present a comprehensive theoretical study of the cross-resonance gate operation
covering estimates for gate parameters and gate error as well as analyzing spectator qubits …

By applying a microwave drive to a specially designed Josephson circuit, we have realized
an elementary quantum optics model, the squeezed Kerr oscillator. This model displays, as …

Residual noise photons in a readout resonator become a major source of dephasing for a
superconducting qubit when the resonator is optimized for a fast, high-fidelity dispersive …

The ability to perform fast, high-fidelity entangling gates is a requirement for a viable
quantum processor. In practice, achieving fast gates often comes with the penalty of strong …