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Entanglement of Signal Paths via Noisy Superconducting Quantum Devices

Quantum routers will provide for important functionality in emerging quantum networks, and the deployment of quantum routing in real networks will initially be realized on low-complexity (few-qubit) noisy quantum devices. A true working quantum router will represent a new application for quantum ent...

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Detalles Bibliográficos
Autores principales: Shi, Wenbo, Malaney, Robert
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9858262/
https://www.ncbi.nlm.nih.gov/pubmed/36673294
http://dx.doi.org/10.3390/e25010153
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author Shi, Wenbo
Malaney, Robert
author_facet Shi, Wenbo
Malaney, Robert
author_sort Shi, Wenbo
collection PubMed
description Quantum routers will provide for important functionality in emerging quantum networks, and the deployment of quantum routing in real networks will initially be realized on low-complexity (few-qubit) noisy quantum devices. A true working quantum router will represent a new application for quantum entanglement—the coherent superposition of multiple communication paths traversed by the same quantum signal. Most end-user benefits of this application are yet to be discovered, but a few important use-cases are now known. In this work, we investigate the deployment of quantum routing on low-complexity superconducting quantum devices. In such devices, we verify the quantum nature of the routing process as well as the preservation of the routed quantum signal. We also implement quantum random access memory, a key application of quantum routing, on these same devices. Our experiments then embed a five-qubit quantum error-correcting code within the router, outlining the pathway for error-corrected quantum routing. We detail the importance of the qubit-coupling map for a superconducting quantum device that hopes to act as a quantum router, and experimentally verify that optimizing the number of controlled-X gates decreases hardware errors that impact routing performance. Our results indicate that near-term realization of quantum routing using noisy superconducting quantum devices within real-world quantum networks is possible.
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spelling pubmed-98582622023-01-21 Entanglement of Signal Paths via Noisy Superconducting Quantum Devices Shi, Wenbo Malaney, Robert Entropy (Basel) Article Quantum routers will provide for important functionality in emerging quantum networks, and the deployment of quantum routing in real networks will initially be realized on low-complexity (few-qubit) noisy quantum devices. A true working quantum router will represent a new application for quantum entanglement—the coherent superposition of multiple communication paths traversed by the same quantum signal. Most end-user benefits of this application are yet to be discovered, but a few important use-cases are now known. In this work, we investigate the deployment of quantum routing on low-complexity superconducting quantum devices. In such devices, we verify the quantum nature of the routing process as well as the preservation of the routed quantum signal. We also implement quantum random access memory, a key application of quantum routing, on these same devices. Our experiments then embed a five-qubit quantum error-correcting code within the router, outlining the pathway for error-corrected quantum routing. We detail the importance of the qubit-coupling map for a superconducting quantum device that hopes to act as a quantum router, and experimentally verify that optimizing the number of controlled-X gates decreases hardware errors that impact routing performance. Our results indicate that near-term realization of quantum routing using noisy superconducting quantum devices within real-world quantum networks is possible. MDPI 2023-01-12 /pmc/articles/PMC9858262/ /pubmed/36673294 http://dx.doi.org/10.3390/e25010153 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Shi, Wenbo
Malaney, Robert
Entanglement of Signal Paths via Noisy Superconducting Quantum Devices
title Entanglement of Signal Paths via Noisy Superconducting Quantum Devices
title_full Entanglement of Signal Paths via Noisy Superconducting Quantum Devices
title_fullStr Entanglement of Signal Paths via Noisy Superconducting Quantum Devices
title_full_unstemmed Entanglement of Signal Paths via Noisy Superconducting Quantum Devices
title_short Entanglement of Signal Paths via Noisy Superconducting Quantum Devices
title_sort entanglement of signal paths via noisy superconducting quantum devices
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9858262/
https://www.ncbi.nlm.nih.gov/pubmed/36673294
http://dx.doi.org/10.3390/e25010153
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