Experimental quantum digital signature based on heralded single-photon sources

The quantum digital signature (QDS) has become a popular research topic in the field of quantum information, due to its information-theoretic security on signing signatures. However, weak coherent sources are often utilized as light sources in most previous QDS protocols, resulting in relative limit...

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Bibliographic Details
Published in:Quantum information processing 2024-01, Vol.23 (1), Article 25
Main Authors: Zhan, Lei, Zhang, Chun-Hui, Lu, Nan, Qian, Xue-Rui, Ding, Hua-Jian, Liu, Jing-Yang, Zhou, Xing-Yu, Wang, Qin
Format: Article
Language:English
Subjects:
Data Structures and Information Theory
Mathematical Physics
Physics
Physics and Astronomy
Quantum Computing
Quantum Information Technology
Quantum Physics
Spintronics
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Summary:The quantum digital signature (QDS) has become a popular research topic in the field of quantum information, due to its information-theoretic security on signing signatures. However, weak coherent sources are often utilized as light sources in most previous QDS protocols, resulting in relative limited secure transmission distance. Here, we propose a four-intensity decoy-state QDS scheme based on heralded single-photon sources (HSPS) and present a concise security analysis in the finite-size scenario. Furthermore, we carry out corresponding experimental demonstrations, and successfully sign messages at 14.4 dB and 24.4 dB, verifying the good performance of implementing QDS with HSPS.
ISSN:1573-1332
1573-1332
DOI:10.1007/s11128-023-04235-3