Total qubit efficiency of quantum key distribution protocol: definition and application
Technical University of Varna, 1 Studentska Str, 9010, Varna, Bulgaria
Accepted: 5 January 2022
Published online: 24 January 2022
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.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022