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

Trapped ions offer long coherence times and high fidelity, programmable quantum
operations, making them a promising platform for quantum simulation of condensed matter …

Minimizing and understanding errors is critical for quantum science, both in noisy
intermediate scale quantum (NISQ) devices and for the quest towards fault-tolerant quantum …

We report on the realization of a fast, scalable, and high-fidelity qubit architecture, based on
Yb 171 atoms in an optical tweezer array. We demonstrate several attractive properties of …

Universal control of multiple qubits—the ability to entangle qubits and to perform arbitrary
individual qubit operations—is a fundamental resource for quantum computing, simulation …

Quantum information carriers, just like most physical systems, naturally occupy high-
dimensional Hilbert spaces. Instead of restricting them to a two-level subspace, these high …

We integrate a long-lived memory qubit into a mixed-species trapped-ion quantum network
node. Ion-photon entanglement first generated with a network qubit in Sr+ 88 is transferred …

Quantum error correction requires the detection of errors via reliable measurements of
multiqubit correlation operators. As these operations are inherently faulty, fault-tolerant …

Abstract Two-dimensional (2D) ion crystals may represent a promising path to scale up qubit
numbers for ion trap quantum information processing. However, to realize universal …

Crosstalk between target and neighboring spectator qubits due to spillover of control signals
represents a major error source limiting the fidelity of two-qubit entangling gates in quantum …