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 …

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 …

We report on an elementary quantum network of two atomic ions separated by 230 m. The
ions are trapped in different buildings and connected with 520 (2) m of optical fiber. At each …

A central goal within quantum optics is to realize efficient, controlled interactions between
photons and atomic media. A fundamental limit in nearly all applications based on such …

Photon-mediated interactions between quantum systems are essential for realizing quantum
networks and scalable quantum information processing. We demonstrate such interactions …

Despite the tremendous progress of quantum cryptography, efficient quantum
communication over long distances (≥ 1000 km) remains an outstanding challenge due to …

We report observations of superradiance for atoms trapped in the near field of a photonic
crystal waveguide (PCW). By fabricating the PCW with a band edge near the D 1 transition …

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 …

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 …

We realize collective enhancement and suppression of light scattered by an array of tweezer-
trapped Rb 87 atoms positioned within a strongly coupled Fabry-Pérot optical cavity. We …