Lo Piparo, N, Razavi, M orcid.org/0000-0003-4172-2125 and Munro, WJ (2017) Memory-Assisted Quantum Key Distribution with a Single Nitrogen-Vacancy Center. Physical Review A, 96 (5). 052313. ISSN 2469-9926
Abstract
Memory-assisted measurement-device-independent quantum key distribution (MA-MDI-QKD) is a promising scheme that aims to improve the rate-versus-distance behavior of a QKD system by using the state-of-the-art devices. It can be seen as a bridge between current QKD links to quantum repeater based networks. While, similar to quantum repeaters, MA-MDI-QKD relies on quantum memory (QM) units, the requirements for such QMs are less demanding than that of probabilistic quantum repeaters. Here, we present a variant of MA-MDI-QKD structure that relies on only a single physical QM: a nitrogen-vacancy center embedded into a cavity where its electronic spin interacts with photons and its nuclear spin is used for storage. This enables us to propose a simple but efficient MA-MDI-QKD scheme resilient to memory errors and capable of beating, in terms of rate and reach, existing QKD demonstrations. We also show how we can extend this setup to a quantum repeater system, reaching, thus, larger distances.
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Copyright, Publisher and Additional Information: | © 2017 American Physical Society. This is an author produced version of a paper published in Physical Review A. Uploaded in accordance with the publisher's self-archiving policy. | ||||||
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Institution: | The University of Leeds | ||||||
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Depositing User: | Symplectic Publications | ||||||
Date Deposited: | 03 Jan 2018 16:23 | ||||||
Last Modified: | 10 Jan 2018 16:57 | ||||||
Status: | Published | ||||||
Publisher: | American Physical Society | ||||||
Identification Number: | https://doi.org/10.1103/PhysRevA.96.052313 | ||||||
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