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 …

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 …

Quantum-classical hybrid algorithms are emerging as promising candidates for near-term
practical applications of quantum information processors in a wide variety of fields ranging …

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 …

Linear strings of trapped atomic ions held in radio-frequency (rf) traps constitute one of the
leading platforms for quantum simulation experiments, allowing the investigation of …

A quantitative assessment of the progress of small prototype quantum processors towards
fault-tolerant quantum computation is a problem of current interest in experimental and …

Experimental results are presented on the efficiency limits for a quantum interface between a
matter-based qubit and a photonic qubit. Using a trapped ion in an optical cavity, we obtain …

Optical spectroscopy in the gas phase is a key tool for elucidating the structure of atoms and
molecules and their interaction with external fields. The line resolution is usually limited by a …

This tutorial introduces the theoretical and experimental basics of electromagnetically
induced transparency (EIT) in thermal alkali vapors. We first give a brief phenomenological …

Quantum computers can efficiently solve classically intractable problems, such as the
factorization of a large number and the simulation of quantum many-body systems …