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 …

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

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 …

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 …

It has long been known that the lifetimes of superconducting qubits suffer during readout,
increasing readout errors. We show that this degradation is due to the anti-Zeno effect, as …

An off-resonant error for a driven quantum system refers to interactions due to the input
drives having nonzero spectral overlap with unwanted system transitions. For the cross …

Reading out the state of superconducting artificial atoms typically relies on dispersive
coupling to a readout resonator. For a given system noise temperature, increasing the …