Optical photons are powerful carriers of quantum information, which can be delivered in free
space by satellites or in fibers on the ground over long distances. Entanglement of quantum …

The distribution of quantum states over long distances is limited by photon loss.
Straightforward amplification as in classical telecommunications is not an option in quantum …

Distributed quantum networks will allow users to perform tasks and to interact in ways which
are not possible with present-day technology. Their implementation is a key challenge for …

Quantum networks provide opportunities and challenges across a range of intellectual and
technical frontiers, including quantum computation, communication and metrology. The …

Quantum memory is essential for the development of many devices in quantum information
processing, including a synchronization tool that matches various processes within a …

A future quantum network will consist of quantum processors that are connected by quantum
channels, just like conventional computers are wired up to form the Internet. In contrast to …

During the past decade the interaction of light with multiatom ensembles has attracted much
attention as a basic building block for quantum information processing and quantum state …

Quantum computation and communication exploit the quantum properties of superposition
and entanglement in order to perform tasks that may be impossible using classical means. In …

We propose a quantum repeater protocol which builds on the well-known Duan-Lukin-Cirac-
Zoller (DLCZ) protocol [LM Duan, MD Lukin, JI Cirac, and P. Zoller, Nature (London) 414 …

Laser frequency noise contributes a significant limitation to today's best atomic clocks. A
proposed solution to this problem is to create a superradiant laser using an optical clock …