Quantum theory has been successfully validated in numerous laboratory experiments. But
would such a theory, which effectively describes the behavior of microscopic physical …

Photons have been a flagship system for studying quantum mechanics, advancing quantum
information science, and developing quantum technologies. Quantum entanglement …

The generation, manipulation, storage, and detection of single photons play a central role in
emerging photonic quantum information technology. Individual photons serve as flying …

Owing to the inevitable loss in communication channels, the distance of entanglement
distribution is limited to approximately 100 kilometres on the ground. Quantum repeaters can …

Worldwide, enormous efforts are directed toward the development of the so‐called quantum
internet. Turning this long‐sought‐after dream into reality is a great challenge that will …

Photonic quantum technologies represent a promising platform for several applications,
ranging from long-distance communications to the simulation of complex phenomena …

Improvements in temporal resolution of single-photon detectors enable increased data rates
and transmission distances for both classical and quantum optical communication systems …

An arbitrary unknown quantum state cannot be measured precisely or replicated perfectly.
However, quantum teleportation enables unknown quantum states to be transferred reliably …

Rare-earth ions (REIs) are promising solid-state systems for building light–matter interfaces
at the quantum level,. This relies on their potential to show narrow optical and spin …

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 …