Modular network for high-rate quantum conferencing

Carlo Ottaviani; Cosmo Lupo; Riccardo Laurenza; Stefano Pirandola

doi:10.1038/s42005-019-0209-6

Modular network for high-rate quantum conferencing

Carlo Ottaviani, Cosmo Lupo, Riccardo Laurenza, Stefano Pirandola

Computer Science

Research output: Contribution to journal › Article › peer-review

Abstract

One of the main open problems in quantum communication is the design of efficient quantum-secured networks. This is a challenging goal, because it requires protocols that guarantee both unconditional security and high communication rates, while increasing the number of users. In this
scenario, continuous-variable systems provide an ideal platform where high rates can be achieved by using off-the-shelf optical components. At the same time, the measurement-device independent architecture is also appealing for its feature of removing a substantial portion of practical weaknesses. Driven by these ideas, here we introduce a modular design of continuous-variable network where each individual module is a measurement-device-independent star network. In each module, the users send modulated coherent states to an untrusted relay, creating multipartite secret correlations via a generalized Bell detection. Using one-time pad between different modules, the network users may share a quantum-secure conference key over arbitrary distances at constant rate.

Original language	English
Article number	118
Number of pages	6
Journal	Communications Physics
Volume	2
DOIs	https://doi.org/10.1038/s42005-019-0209-6
Publication status	Published - 30 Sept 2019

Bibliographical note

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10.1038/s42005-019-0209-6

s42005-019-0209-6
© The Author(s) 2019
Final published version, 632 KBLicence: CC BY

Cite this

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