Fifty years of developments in nuclear magnetic resonance (NMR) have resulted in an
unrivaled degree of control of the dynamics of coupled two-level quantum systems. This …

Benchmarking is how the performance of a computing system is determined. Surprisingly,
even for classical computers this is not a straightforward process. One must choose the …

The interaction between Rydberg states of neutral atoms is strong and long-range, making it
appealing to put it to use in the context of quantum technologies. Recently, first applications …

In realizations of quantum computing, a two-level system (qubit) is often singled out from the
many levels of an anharmonic oscillator. In these cases, simple qubit control fails on short …

The faithful storage of a quantum bit (qubit) of light is essential for long-distance quantum
communication, quantum networking and distributed quantum computing. The required …

This Letter presents a simple formula for the average fidelity between a unitary quantum
gate and a general quantum operation on a qudit, generalizing the formula for qubits found …

With growing success in experimental implementations it is critical to identify a “gold
standard” for quantum information processing, a single measure of distance that can be …

We describe a scalable stochastic method for the experimental measurement of generalized
fidelities characterizing the accuracy of the implementation of a coherent quantum …

Complete and precise characterization of a quantum dynamical process can be achieved
via the method of quantum process tomography. Using a source of correlated photons, we …

In qubits made from a weakly anharmonic oscillator the leading source of error at short gate
times is leakage of population out of the two dimensional Hilbert space that forms the qubit …