Equitable Multiparty Quantum Communication without a Trusted Third Party

Tanumoy Pramanik, Dong Hwa Lee, Young Wook Cho, Hyang Tag Lim, Sang Wook Han, Hojoong Jung, Sung Moon, Kwang Jo Lee, Yong Su Kim

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Article number064074
JournalPhysical Review Applied
Volume14
Issue number6
DOIs
Publication statusPublished - 2020 Dec 29

Bibliographical note

Funding Information:
The authors thank Y. Shin for experimental assistance. This work is supported by the National Research Foundation of Korea (Grants No. 2019M3E4A1079777, No. 2019R1A2C2006381, and No. 2019M3E4A107866011), MSIT/IITP (Grants No. 2020-0-00972, and 2020-0-00947), and a KIST research program (Grant No. 2E30620).

Funding Information:
This work is supported by the National Research Foundation of Korea (Grants No. 2019M3E4A1079777, No. 2019R1A2C2006381, and No. 2019M3E4A107866011), MSIT/IITP (Grants No. 2020-0-00972, and 2020-0-00947), and a KIST research program (Grant No. 2E30620).

Publisher Copyright:
© 2020 American Physical Society.

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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