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An all-photonic repeater scheme based on a type of graph state called arepeater graph state (RGS) promises tolerance to photon losses as well asoperational errors, and offers a fast Bell pair generation rate, limited onlyby the RGS creation time (rather than enforced round-trip waits). Priorresearch on the topic has focused on the RGS generation and analyzing thesecret key sharing rate, but there is a need to extend to use cases such asdistributed computation or teleportation as will be used in a general-purposeQuantum Internet. Here, we propose a protocol and architecture that considerhow end nodes participate in the connection; the capabilities andresponsibilities of each node; the classical communications between nodes; andthe Pauli frame correction information per end-to-end Bell pair. We givegraphical reasoning on the correctness of the protocol via graph statemanipulation rules. We then show that the RGS scheme is well suited to use in alink architecture connecting memory-based repeaters and end nodes forapplications beyond secret sharing. Finally, we discuss the practicality ofimplementing our proposed protocol on quantum network simulators and how it canbe integrated into an existing proposed quantum network architecture.

Architecture and protocols for all-photonic quantum repeaters