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Large-Alphabet Encoding Schemes for Floodlight Quantum Key Distribution

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Abstract

Floodlight quantum key distribution (FL-QKD) uses binary phase-shift keying (BPSK) of multiple optical modes to achieve Gbps secret-key rates (SKRs) at metropolitan-area distances. We show that FL-QKD’s SKR can be doubled by using 32-ary PSK.

© 2017 Optical Society of America

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