Repeater-Like Asynchronous Measurement-Device-Independent Quantum Conference Key Agreement

• URL: http://arxiv.org/abs/2406.15853v2
• Date: Tue, 18 Mar 2025 08:57:54 GMT
• Title: Repeater-Like Asynchronous Measurement-Device-Independent Quantum Conference Key Agreement
• Authors: Yu-Shuo Lu, Yuan-Mei Xie, Yao Fu, Hua-Lei Yin, Zeng-Bing Chen,
• Abstract summary: Quantum conference key agreement enables secure communication among multiple parties by leveraging multipartite entanglement.<n>We propose a measurement-device-independent quantum conference key agreement protocol that employs asynchronous Greenberger-Horne-Zeilinger state measurement.
• Score: 14.261895897404726
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum conference key agreement enables secure communication among multiple parties by leveraging multipartite entanglement, which is expected to play a crucial role in future quantum networks. However, the practical application of this technology has been severely limited by the experimental complexity and low efficiency associated with the requirement for synchronous detection of multipartite entangled states. In this work, we propose a measurement-device-independent quantum conference key agreement protocol that employs asynchronous Greenberger-Horne-Zeilinger state measurement. Our protocol enables a linear scaling of the conference key rate among multiple parties, demonstrating performance comparable to that of the single-repeater scheme in quantum networks. Additionally, we achieve intercity transmission distances with composable security under finite-key conditions. By adopting the generalized asynchronous pairing strategy, our approach eliminates the need for complex global phase locking techniques. Furthermore, by integrating asynchronous pairing with ring-interference network structure, our method provides insights for various quantum tasks beyond quantum communication, such as multiparty computing and quantum repeaters.

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