Integrated quantum photonics uses classical integrated photonic technologies and devices
for quantum applications. As in classical photonics, chip-scale integration has become …

BACKGROUND The past two decades have seen intense efforts aimed at building quantum
computing hardware with the potential to solve problems that are intractable on classical …

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 …

Widely tunable and narrow-linewidth lasers at visible wavelengths are necessary for
applications such as quantum optics, optical clocks and atomic and molecular physics. At …

Integrated photonics will play a key role in quantum systems as they grow from few-qubit
prototypes to tens of thousands of qubits. The underlying optical quantum technologies can …

Quantum information processing is steadily progressing from a purely academic discipline
towards applications throughout science and industry. Transitioning from lab-based, proof-of …

Integrated photonics has profoundly affected a wide range of technologies underpinning
modern society,,–. The ability to fabricate a complete optical system on a chip offers …

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 …

Monolithic integration of control technologies for atomic systems is a promising route to the
development of quantum computers and portable quantum sensors,,–. Trapped atomic ions …

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