Pramanik, Tanumoy Lee, Dong-Hwa Cho, Young-Wook Lim, Hyang-Tag Han, Sang-Wook Jung, Hojoong Moon, Sung Lee, Kwang Jo Kim, Yong-Su 2024-01-19T16:00:37Z 2024-01-19T16:00:37Z 2021-09-02 2020-12-29 2331-7019 https://pubs.kist.re.kr/handle/201004/117661 Multiparty quantum communication provides delightful applications, including quantum cryptographic communication and quantum secret sharing. Quantum communication based on the Greenberg-Home-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. English AMER PHYSICAL SOC 2-PHOTON INTERFERENCE KEY DISTRIBUTION STATE PROTOCOLS SHARE Equitable Multiparty Quantum Communication Without a Trusted Third Party Article 10.1103/PhysRevApplied.14.064074 1 PHYSICAL REVIEW APPLIED, v.14, no.6 PHYSICAL REVIEW APPLIED 14 6 scie scopus 000603422600001 2-s2.0-85099125490 Physics, Applied Physics Article 2-PHOTON INTERFERENCE KEY DISTRIBUTION STATE PROTOCOLS SHARE 양자통신 양자얽힘 양자정보 양자광학