Modular network for high-rate quantum conferencing
Authors: Ottaviani C., Lupo C., Laurenza R., Pirandola S.
Autors Affiliation: Univ York, Comp Sci, York YO10 5GH, N Yorkshire, England; Univ York, York Ctr Quantum Technol, York YO10 5GH, N Yorkshire, England; Univ Sheffield, Dept Phys & Astron, Hounsfield Rd, Sheffield S3 7RH, S Yorkshire, England; INO CNR, QSTAR, Largo Enrico Fermi 2, I-50125 Florence, Italy; LENS, Largo Enrico Fermi 2, I-50125 Florence, Italy; MIT, Res Lab Elect, 77 Massachusetts Ave, Cambridge, MA 02139 USA
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.
Journal/Review: COMMUNICATIONS PHYSICS
Volume: 2 Pages from: 118-1 to: 118-6
KeyWords: KEY DISTRIBUTION; COMMUNICATION; INFORMATION; DISCRETEDOI: 10.1038/s42005-019-0209-6Citations: 11data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-10References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here