Architecture and protocols for all-photonic quantum repeaters

• URL: http://arxiv.org/abs/2306.03748v2
• Date: Tue, 18 Jun 2024 06:06:48 GMT
• Title: Architecture and protocols for all-photonic quantum repeaters
• Authors: Naphan Benchasattabuse, Michal Hajdušek, Rodney Van Meter,
• Abstract summary: All-photonic quantum repeater scheme promises resilience to photon losses and operational errors. We propose a new emitter-photonic qubit building block and an RGS protocol that addresses several key considerations. Our proposed building block significantly reduces the total number of emissive quantum memories required for end nodes.
• Score: 0.49157446832511503
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The all-photonic quantum repeater scheme, utilizing a type of graph state called the repeater graph state (RGS), promises resilience to photon losses and operational errors, offering a fast Bell pair generation rate limited only by the RGS creation time (rather than enforced round-trip waits). While existing research has predominantly focused on RGS generation and secret key sharing rate analysis, there is a need to extend investigations to encompass broader applications, such as distributed computation and teleportation, the main tasks envisioned for the Quantum Internet. Here we propose a new emitter-photonic qubit building block and an RGS protocol that addresses several key considerations: end node involvement in connection establishment, decoding of logical qubits within the RGS, and computing the Pauli frame corrections at each participating node to ensure the desired correct end-to-end Bell pair state. Our proposed building block significantly reduces the total number of emissive quantum memories required for end nodes and seamlessly integrates all-photonic and memory-based repeaters under the same communication protocol. We also present an algorithm for decoding logical measurement results, employing graphical reasoning based on graph state manipulation rules.

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