论文标题
实验自由空间量子安全直接通信及其安全分析
Experimental free-space quantum secure direct communication and its security analysis
论文作者
论文摘要
我们报告了基于单个光子的自由空间量子安全直接通信的实验实现。量子通信方案使用相位编码，并且优化了非对称的Mach-Zehnder干涉仪，以自动补偿光子在自由空间介质上的过渡过程中的相位漂移。在10米的自由空间上，信息传输率为500 bps，平均量子位错误率为0.49％$ \ pm $ 0.27％。在EVE执行集体攻击和光子数拆分集体攻击的情况下，对安全性进行了分析。我们的结果表明，量子安全直接通信在自由空间中是可行的。
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%$\pm$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.
