Subcarrier wave continuous variable quantum key distribution with discrete modulation: mathematical model and finite-key analysis
In this paper we report a continuous-variable quantum key distribution protocol using multimode coherent states generated on subcarrier frequencies of the optical spectrum. We propose a coherent detection scheme where power from a carrier wave is used as a local oscillator. We compose a mathematical...
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| Veröffentlicht in: | Scientific reports 2020-06, Vol.10 (1), p.10034-10034, Article 10034 |
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| creator | Samsonov, E. Goncharov, R. Gaidash, A. Kozubov, A. Egorov, V. Gleim, A. |
| description | In this paper we report a continuous-variable quantum key distribution protocol using multimode coherent states generated on subcarrier frequencies of the optical spectrum. We propose a coherent detection scheme where power from a carrier wave is used as a local oscillator. We compose a mathematical model of the proposed scheme and perform its security analysis in the finite-size regime using fully quantum asymptotic equipartition property technique. We calculate a lower bound on the secret key rate for the system under the assumption that the quantum channel noise is negligible compared to detector dark counts, and an eavesdropper is restricted to collective attacks. Our calculation shows that the current realistic system implementation would allow distributing secret keys over channels with losses up to 9 dB. |
| doi_str_mv | 10.1038/s41598-020-66948-0 |
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| subjects | 639/624 639/624/1075/187 639/624/400/482 Humanities and Social Sciences Mathematical models multidisciplinary Science Science (multidisciplinary) |
| title | Subcarrier wave continuous variable quantum key distribution with discrete modulation: mathematical model and finite-key analysis |
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