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Total qubit efficiency of quantum key distribution protocol: definition and application

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Abstract

The paper reports a revision to the definition of efficiency (or qubit efficiency) of a quantum key distribution (QKD) protocol, which is called total qubit efficiency. The revised efficiency is introduced as a quantity proportional to the Shannon’s information conveyed by a single qubit. This definition takes into account the processes performed in a standard quantum key distribution protocol: transfer, sifting, parameter estimation, key reconciliation, and privacy amplification. Furthermore, we apply the newly proposed total qubit efficiency for the sake of evaluation and comparison of different QKD schemes.

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Acknowledgements

The work is supported by the project \(\hbox {K}\Pi \)-06-H37/1 /06.12.2019, funded by National Science Fund, Ministry of Education and Science, Bulgaria.

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  1. Technical University of Varna, 1 Studentska Str, 9010, Varna, Bulgaria

    Georgi Bebrov

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  1. Georgi Bebrov
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Bebrov, G. Total qubit efficiency of quantum key distribution protocol: definition and application. Eur. Phys. J. Plus 137, 169 (2022). https://doi.org/10.1140/epjp/s13360-022-02353-y

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