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Quantum Information Processing

Erschienen in:

01.10.2021

Plug-and-play sending-or-not-sending twin-field quantum key distribution

verfasst von: Ke Xue, Shengmei Zhao, Qianping Mao, Rui Xu

Erschienen in: Quantum Information Processing | Ausgabe 10/2021

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Abstract

Twin-field quantum key distribution (TF-QKD) is a new extraordinary QKD protocol, which can overcome the fundamental rate-distance limit without quantum repeaters. Moreover, its variant, the sending-or-not-sending twin-field quantum key distribution (SNS-QKD) protocol, can both tolerate large misalignment error and have a higher key rate; however, the light source is assumed to be the trusted one in the original SNS protocol. In this paper, we propose a more practical SNS-QKD protocol with plug-and-play architecture, named \( P \& P\) SNS-QKD protocol. We present the framework of \( P \& P\) SNS-QKD protocol and analyze the tight bound of its key rate with the four-intensity decoy-state method. The proposed protocol can avoid the careful adjustments, and the control of the system and the numerical simulations results show that the proposed protocol has a close key generation rate to that of the original SNS-QKD. Besides, the proposed protocol still maintains a high tolerance for misalignment errors even if the source is unknown and untrusted.

Vorheriger Artikel Quantum secure multi-party summation based on entanglement swapping

Nächster Artikel Probing tripartite entanglement and coherence dynamics in pure and mixed independent classical environments

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Titel: Plug-and-play sending-or-not-sending twin-field quantum key distribution
verfasst von: Ke Xue
Shengmei Zhao
Qianping Mao
Rui Xu
Publikationsdatum: 01.10.2021
Verlag: Springer US
Erschienen in: Quantum Information Processing / Ausgabe 10/2021
Print ISSN: 1570-0755
Elektronische ISSN: 1573-1332
DOI: https://doi.org/10.1007/s11128-021-03259-x

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