"An elementary quantum network of single atoms in optical cavities."

"Quantum networks form the basis of distributed quantum computing architectures and quantum communication. Single atoms in optical cavities are ideally suited as universal quantum network nodes capable of sending, storing and retrieving quantum information. We demonstrate this by presenting an elementary version of a quantum network based on two identical nodes in remote, independent laboratories. The dynamic control of coherent dark states allows for the reversible exchange of quantum information by exchange of a single photon."