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 …

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 …

The second quantum revolution hinges on the creation of materials that unite atomic
structural precision with electronic and structural tunability. A molecular approach to …

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 …

Optical atomic clocks represent the state of the art in the frontier of modern measurement
science. In this article a detailed review on the development of optical atomic clocks that are …

Recent developments in frequency metrology and optical clocks have been based on
electronic transitions in atoms and singly charged ions as references. The control over all …

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 …

A long-time quantum memory capable of storing and measuring quantum information at the
single-qubit level is an essential ingredient for practical quantum computation and …

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 …

Entangled states are a key resource in fundamental quantum physics, quantum
cryptography and quantum computation. Introduction of controlled unitary processes …