Experimental free-space quantum secure direct communication and its security analysis
Quantum Physics
2020-09-04 v2
Abstract
We report an experimental implementation of free-space quantum secure direct communication based on single photons. The quantum communication scheme uses phase encoding, and the asymmetric Mach-Zehnder interferometer is optimized so as to automatically compensate phase drift of the photons during their transitions over the free-space medium. An information transmission rate of 500 bps over a 10-meter free space with a mean quantum bit error rate of 0.49%0.27% is achieved. The security is analyzed under the scenario that Eve performs collective attack and photon number splitting collective attack. Our results show that quantum secure direct communication is feasible in free space.
Cite
@article{arxiv.2005.05102,
title = {Experimental free-space quantum secure direct communication and its security analysis},
author = {Dong Pan and Zaisheng Lin and Jiawei Wu and Zhen Sun and Dong Ruan and Liuguo Yin and Guilu Long},
journal= {arXiv preprint arXiv:2005.05102},
year = {2020}
}