Trapped ions are among the most promising systems for practical quantum computing (QC).
The basic requirements for universal QC have all been demonstrated with ions, and …

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

We describe and benchmark a new quantum charge-coupled device (QCCD) trapped-ion
quantum computer based on a linear trap with periodic boundary conditions, which …

Practical and useful quantum information processing requires substantial improvements with
respect to current systems, both in the error rates of basic operations and in scale. The …

We demonstrate laser-driven two-qubit and single-qubit logic gates with respective fidelities
99.9 (1)% and 99.9934 (3)%, significantly above the≈ 99% minimum threshold level …

Trapped atomic ions are standards for quantum information processing, serving as quantum
memories, hosts of quantum gates in quantum computers and simulators, and nodes of …

Electric-field noise near surfaces is a common problem in diverse areas of physics and a
limiting factor for many precision measurements. There are multiple mechanisms by which …

The availability of a universal quantum computer may have a fundamental impact on a vast
number of research fields and on society as a whole. An increasingly large scientific and …

Quantum error correction is widely thought to be the key to fault-tolerant quantum
computation. However, determining the most suited encoding for unknown error channels or …

Moving trapped-ion qubits in a microstructured array of radiofrequency traps offers a route
toward realizing scalable quantum processing nodes. Establishing such nodes, providing …