Quantum secret sharing (QSS) is essential for multiparty quantum communication, which is one of cornerstones in the future quantum internet. However, a linear rate-distance limitation severely constrains the secure key rate and transmission distance of QSS. Here, we present a practical QSS protocol among three participants based on the differential phase shift scheme and twin field ideas for the solution of high-efficiency multiparty communication task. In contrast to formerly proposed differential phase shift QSS protocol, our protocol can break the linear rate-distance bound, theoretically improving the secret key rate by three orders of magnitude in a 300-km-long fiber. Furthermore, the new protocol is secure against Trojan horse attacks that cannot be resisted by previous differential phase shift QSS.
@article{arxiv.2104.03467,
title = {Differential phase shift quantum secret sharing using twin field},
author = {Jie Gu and Xiao-Yu Cao and Hua-Lei Yin and Zeng-Bing Chen},
journal= {arXiv preprint arXiv:2104.03467},
year = {2021}
}