Quantum networks providing shared entanglement over a mesh of quantum nodes will
revolutionize the field of quantum information science by offering novel applications in …

Widely tunable and narrow-linewidth lasers at visible wavelengths are necessary for
applications such as quantum optics, optical clocks and atomic and molecular physics. At …

Many-particle entanglement is a key resource for achieving the fundamental precision limits
of a quantum sensor. Optical atomic clocks, the current state of the art in frequency precision …

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 …

An optical quantum memory is a device that can store photonic quantum information and
release it after a controlled time. It is an essential component for overcoming channel losses …

Building scalable quantum systems that demonstrate performance enhancement based on
entanglement is a major goal in quantum computing and metrology. The main challenge …

The generation of long-lived entanglement in optical atomic clocks is one of the main goals
of quantum metrology. Arrays of neutral atoms, where Rydberg-based interactions may …

A quantum repeater node is presented based on trapped ions that act as single-photon
emitters, quantum memories, and an elementary quantum processor. The node's ability to …

Quantum sensors are used for precision timekeeping, field sensing and quantum
communication,–. Comparisons among a distributed network of these sensors are capable …

A key challenge in realizing practical quantum networks for long-distance quantum
communication involves robust entanglement between quantum memory nodes connected …