Related papers: Coherent one-way quantum conference key agreement based on twin field

Coherent one-way quantum conference key agreement based on twin field

URL: http://arxiv.org/abs/2109.02233v1
Date: Mon, 6 Sep 2021 03:53:08 GMT
Title: Coherent one-way quantum conference key agreement based on twin field
Authors: Xiao-Yu Cao, Jie Gu, Yu-Shuo Lu, Hua-Lei Yin, Zeng-Bing Chen
Abstract summary: Quantum conference key agreement (CKA) enables key sharing among trusted users with information-theoretic security. We propose a quantum CKA protocol of three users. Exploiting coherent states with intensity 0 and $mu$ to encode logic bits, our protocol can break the limit.
Score: 9.369069713000165
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Quantum conference key agreement (CKA) enables key sharing among multiple trusted users with information-theoretic security. Currently, the key rates of most quantum CKA protocols suffer from the limit of the total efficiency among quantum channels. Inspired by the coherent one-way and twin-field quantum key distribution (QKD) protocols, we propose a quantum CKA protocol of three users. Exploiting coherent states with intensity 0 and $\mu$ to encode logic bits, our protocol can break the limit. Additionally, the requirements of phase randomization and multiple intensity modulation are removed in our protocol, making its experimental demonstration simple.

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