Fast, high efficiency and low error single-photon sources are required for the implementation
of a number of quantum information processing applications. The fastest triggered single …

The control of individual quantum systems is now a reality in a variety of physical settings.
Feedback control is an important class of control methods because of its ability to reduce the …

Future communication and computation technologies that exploit quantum information
require robust and well-isolated qubits. Electron spins in iii–v semiconductor quantum dots …

The interaction between a confined electron and the nuclei of an optically active quantum
dot provides a uniquely rich manifestation of the central spin problem. Coherent qubit control …

Quantum decoherence is a central concept in physics. Applications such as quantum
information processing depend on understanding it; there are even fundamental theories …

A spin-photon interface should operate with both coherent photons and a coherent spin to
enable cluster-state generation and entanglement distribution. In high-quality devices, self …

A single hole spin in a semiconductor quantum dot has emerged as a quantum bit that is
potentially superior to an electron spin. A key feature of holes is that they have a greatly …

A key ingredient for a quantum network is an interface between stationary quantum bits and
photons, which act as flying qubits for interactions and communication. Photonic crystal …

A controlled quantum system can alter its environment by feedback, leading to reduced-
entropy states of the environment and to improved system coherence. Here, using a …

Resonant optical excitation of lowest-energy excitonic transitions in self-assembled quantum
dots leads to nuclear spin polarization that is qualitatively different from the well-known …