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Erschienen in: Quantum Information Processing 1/2021

01.01.2021

Qutrit-based semi-quantum key distribution protocol

verfasst von: Hasnaa Hajji, Morad El Baz

Erschienen in: Quantum Information Processing | Ausgabe 1/2021

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Abstract

This article provides the unconditional security of a semi quantum key distribution (SQKD) protocol based on 3-dimensional quantum states. By deriving a lower bound for the key rate, in the asymptotic scenario, as a function of the quantum channel’s noise, we find that this protocol has improved secret key rate with much more tolerance for noise compared to the previous 2-dimensional SQKD protocol. Our results highlight that, similar to the fully quantum key distribution protocol, increasing the dimension of the system can increase the noise tolerance in the semi-quantum key distribution, as well.

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1
Bob’s qualification as a classical user stems from his inability to use (measure and/or prepare states in) more than one basis, unlike Alice, the fully quantum user, capable of using both the \(\mathcal {A}\) and \(\mathcal {K}\) bases (or the \(\mathcal {A}\) and \(\mathcal {T}\) bases, based on the version of the protocol adopted).
 
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Metadaten
Titel
Qutrit-based semi-quantum key distribution protocol
verfasst von
Hasnaa Hajji
Morad El Baz
Publikationsdatum
01.01.2021
Verlag
Springer US
Erschienen in
Quantum Information Processing / Ausgabe 1/2021
Print ISSN: 1570-0755
Elektronische ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-020-02927-8

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