Quantum secure direct communication (QSDC) guarantees both the security and reliability of information transmission using quantum states. One-photon-interference QSDC (OPI-QSDC) is a technique that enhances the transmission distance and ensures secure point-to-point information transmission, but it requires complex phase locking technology. This paper proposes a mixed-encoding one-photon-interference QSDC (MO-QSDC) protocol that removes the need for phase locking technology. Numerical simulations demonstrate that the MO-QSDC protocol could also beat the PLOB bound.
@article{arxiv.2404.02787,
title = {Mixed-encoding one-photon-interference quantum secure direct communication},
author = {Xiangjie Li and Yuanbin Cheng and Xingbo Pan and Yunrong Zhang and Guilu Long},
journal= {arXiv preprint arXiv:2404.02787},
year = {2024}
}