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 …

Quantum computers have made extraordinary progress over the past decade, and
significant milestones have been achieved along the path of pursuing universal fault-tolerant …

High-fidelity two-qubit gates at scale are a key requirement to realize the full promise of
quantum computation and simulation. The advent and use of coupler elements to tunably …

Improving two-qubit gate performance and suppressing cross talk are major, but often
competing, challenges to achieving scalable quantum computation. In particular, increasing …

Currently available superconducting quantum processors with interconnected transmon
qubits are noisy and prone to various errors. The errors can be attributed to sources such as …

Quantum computers built with superconducting artificial atoms already stretch the limits of
their classical counterparts. While the lowest energy states of these artificial atoms serve as …

Maintaining or even improving gate performance with growing numbers of parallel
controlled qubits is a vital requirement for fault-tolerant quantum computing. For …

Generating high-fidelity, tunable entanglement between qubits is crucial for realizing gate-
based quantum computation. In superconducting circuits, tunable interactions are often …

Striving for higher gate fidelity is crucial not only for enhancing existing noisy intermediate-
scale quantum devices, but also for unleashing the potential of fault-tolerant quantum …

High fidelity two-qubit gates exhibiting low cross talk are essential building blocks for gate-
based quantum information processing. In superconducting circuits, two-qubit gates are …