Multipartite entanglement and secret key distribution in quantum networks

Understand

Distribution and distillation of entanglement over quantum networks is a basic task for Quantum Internet applications.

• A fundamental question is then to determine the ultimate performance of entanglement distribution over a given network.
• Although this question has been extensively explored for bipartite entanglement-distribution scenarios, less is known about multipartite entanglement distribution.
• Here we establish the fundamental limit of distributing multipartite entanglement, in the form of GHZ states, over a quantum network.