2020/06/15 by Tanumoy Pramanik, Dong-Hwa Lee, Young-Wook Cho +6
Computer Science · Physics and Astronomy · #Cryptography #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum cryptography #Quantum information science #Scheme (mathematics) #Secure communication #State (computer science) #Trusted third party #quant-ph
paper · pdf · doi:10.1103/physrevapplied.14.064074
published as Phys. Rev. Applied 14, 064074 (2020) · Ask the authors for the supplemental materials
arxiv created 2020/06/15 · openalex created_date 2020/06/19 · openalex publication_date 2020/12/29 · arxiv updated 2021/01/04 · openalex updated_date 2026/08/05
Multiparty quantum communication provides delightful applications, including quantum cryptographic communication and quantum secret sharing. Quantum communication based on the Greenberg-Horne-Zeilinger (GHZ) state measurement provides a practical way to implement multiparty quantum communication. With the standard spatially localized GHZ state measurement, however, information can be imbalanced among the communication parties that can cause significant problems in some applications of multiparty cryptographic communication, e.g., secret sharing. Here, we propose an equitable multiparty quantum communication where information balance among the communication parties is achieved without a trusted third party. Our scheme is based on the GHZ state measurement that is not spatially localized but implemented in a way that all the distant communication parties symmetrically participate. We also verify the feasibility of our scheme by presenting the proof-of-principle experimental demonstration of informationally balanced three-party quantum communication using weak coherent pulses.