High-Rate Continuous Variable Quantum Key Distribution Based on Probabilistically Shaped 64 and 256-QAM
Fran\c{c}ois Roumestan, Amirhossein Ghazisaeidi, J\'er\'emie, Renaudier, Luis Trigo Vidarte, Eleni Diamanti, Philippe Grangier
TL;DR
This paper demonstrates a high-rate continuous variable quantum key distribution system using probabilistically shaped 64 and 256-QAM, achieving over 66 Mbps secret key rates over 9.5 km fiber with a new security proof.
Contribution
It introduces a CV-QKD system with off-the-shelf components and a novel analytical security proof, enabling high secret key rates with probabilistically shaped QAM.
Findings
Achieved over 66 Mbps secret key rate over 9.5 km fiber
Successfully implemented probabilistically shaped 64 and 256-QAM
Validated the feasibility with a new security proof
Abstract
We designed a CV-QKD system with off-the-shelf components and established the feasibility of distributing 67.6 and 66.8 Mb/s secret key rates on average over a 9.5 km SMF link, using respectively probabilistically shaped 64 and 256 QAM, and relying on a novel analytical security proof.
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Taxonomy
TopicsOptical Network Technologies · Quantum Information and Cryptography · Quantum Computing Algorithms and Architecture