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 …

Since the pioneering works by Landau, Zener, Stückelberg, and Majorana (LZSM), it has
been known that driving a quantum two-level system results in tunneling between its states …

Practical quantum computing will require error rates well below those achievable with
physical qubits. Quantum error correction, offers a path to algorithmically relevant error rates …

Quantum computers hold the promise of solving computational problems that are intractable
using conventional methods. For fault-tolerant operation, quantum computers must correct …

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 …

The realization of quantum error correction is an essential ingredient for reaching the full
potential of fault-tolerant universal quantum computation. Using a range of different …

Quantum algorithms offer a dramatic speedup for computational problems in material
science and chemistry. However, any near-term realizations of these algorithms will need to …

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

Future fault-tolerant quantum computers will require storing and processing quantum data in
logical qubits. Here we realize a suite of logical operations on a distance-2 surface code …

High-quality two-qubit gate operations are crucial for scalable quantum information
processing. Often, the gate fidelity is compromised when the system becomes more …