Researchers in Boston have demonstrated entanglement between quantum network nodes over a 35-km fiber link, proving the feasibility of long-distance quantum entanglement in real-world conditions.

Terra Quantum AG in Switzerland implemented the QCKD protocol for secure quantum communication over a 1707 km fiber line.

Teams in China, Europe, and the US developed new protocols for generating verifiable quantum entanglement between nodes in a network, enabling the exchange of quantum information between distant quantum memories.

Quantum repeaters are crucial in allowing entanglement between quantum bits at intermediate points.

China successfully entangled rubidium-87 atoms using the DLCZ protocol.

Europe utilized solid-state quantum memories made from vacancy centers in diamond.

The Harvard team in the US developed a distributed quantum computer.

These advancements mark significant progress towards establishing a practical quantum communication network and potentially leading to a quantum version of the Internet.