A quantum router architecture for high-fidelity entanglement flows in quantum networks
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s41534-022-00582-8.pdf
Description
Published version
Size
1.01 MB
Format
Adobe PDF
Checksum (MD5)
b9b64f350500e141756eddfcb650d002
Author(s)
Lee, Yuan
Bersin, Eric
Dahlberg, Axel
Wehner, Stephanie
Englund, Dirk
Date Issued
December 2022
Journal
npj Quantum Information
Publisher
Springer Science and Business Media LLC
Citation
Lee, Yuan, Bersin, Eric, Dahlberg, Axel, Wehner, Stephanie and Englund, Dirk. 2022. "A quantum router architecture for high-fidelity entanglement flows in quantum networks." npj Quantum Information, 8 (1).
Version
Final published version
Abstract
AbstractThe past decade has seen tremendous progress in experimentally realizing the building blocks of quantum repeaters. Repeater architectures with multiplexed quantum memories have been proposed to increase entanglement distribution rates, but an open challenge is to maintain entanglement fidelity over long-distance links. Here, we address this with a quantum router architecture comprising many quantum memories connected in a photonic switchboard to broker entanglement flows across quantum networks. We compute the rate and fidelity of entanglement distribution under this architecture using an event-based simulator, finding that the router improves the entanglement fidelity as multiplexing depth increases without a significant drop in the entanglement distribution rate. Specifically, the router permits channel-loss-invariant fidelity, i.e. the same fidelity achievable with lossless links. Furthermore, this scheme automatically prioritizes entanglement flows across the full network without requiring global network information. The proposed architecture uses present-day photonic technology, opening a path to near-term deployable multi-node quantum networks.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Research Laboratory of Electronics
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/s41534-022-00582-8
